Zenless Zone Zero

The story takes place in New Eridu, the last major city to survive the Hollows disaster. The rest of the world was devastated by these spatial anomalies, vast dimensions that appear unpredictably, warp space and time, and are infested with monsters called Ethereals. The Hollows contain Aether, a powerful energy source that also corrupts living beings and can transform them into Ethereals if they remain exposed for too long. Despite its danger, New Eridu prospered thanks to technology capable of extracting and harnessing Aether as its primary energy source.

The city blends futuristic technology with a modern urban aesthetic. Humans, Thirens (people with animal features), Intelligent Constructs, and Bangboos coexist. It's common to see cars, motorcycles, trains, cafes, shopping malls, and residential neighborhoods alongside service robots, high-tech weapons, and devices powered by Aether.

The Hollows can open without warning, even near the city. Numerous organizations, such as PubSec, HAND, the Defense Force, proxies, private companies, and various independent factions, operate to combat them, rescuing civilians or extracting resources. The most dangerous is Hollow Zero, the oldest and largest known Hollow, whose growth destroyed the old Eridu and gave rise to New Eridu.

Bangboos are small, intelligent robots that assist in daily life and during expeditions, while Proxies guide explorers through the Cavities using specialized navigation systems. Although daily life seems normal, any mission can quickly turn into a fight for survival against the Ether and the corruption of the Aether.

Hollows are supernatural phenomena that appear spontaneously all over the world. They are enormous, dark, spherical structures that can emerge without warning and swallow buildings, roads, and entire areas. Inside them, space and the laws of physics are distorted, creating constantly shifting labyrinths that make navigation difficult.

Each Cavity is different: they can vary in size, structure, level of Aetheric activity, hazards, and creatures present. Some are relatively stable and can be explored using specialized equipment, while others are extremely dangerous. Aetherics appear and develop within them, making them a constant threat.

Prolonged exposure to the Aether causes corruption, especially in individuals with low Aetheric aptitude. Symptoms can include pain, physical alterations, and loss of mental faculties; advanced corruption can transform a person into an Aether. For this reason, explorers use protective equipment, inhibitors, and anti-corruption serums.

The Cavities also contain valuable Etheric resources, so New Eridu has developed technology to harness them as an energy source. This has allowed the city to thrive despite the danger. Researchers, proxies, agents, raiders, and specialized organizations operate within them.

Important: Hollow Zero is just one specific Cavity, albeit the largest and most dangerous known. It destroyed ancient Eridu and is linked to the origin of numerous nearby Cavities, but not all Cavities are Hollow Zero or directly connected to it. Stories and quests can take place in any Cavity in the world.

New Eridu: Humanity's last great city and the center of civilization. It combines Aether technology with modern urban life, where humans, thirens, constructs, and Bangbuses coexist.

Sixth Street: A quiet residential and commercial neighborhood. It's home to Random Play, the Coff Café, the Box Galaxy gadget shop, the Turquoise Toy Store, and various other businesses frequented by residents and law enforcement officers.

Lumina Square: New Eridu's busiest commercial district. It's packed with restaurants, shopping malls, cinemas, offices, holographic displays, and a vibrant nightlife.

Ballet Twins Road: Once an entertainment district, a Cavity turned it into a ruined area infested with Ethereals. It is now a dangerous location used for operations and exploration.

Scott Outpost: Base of operations located next to Hollow Zero. From here, expeditions, investigations, and rescue missions depart for the most dangerous known cave.

Hollow Zero: The largest and oldest cavern in the world. It was responsible for the destruction of ancient Eridu and continues to slowly expand. Its interior is constantly changing and houses the most powerful Ethereals.

Outer Ring: A vast region located outside of New Eridu. It consists of deserts, roads, towns, and independent settlements where gangs, mercenaries, and transporters like the Sons of Calydon operate.

Suibian Temple: An ancient temple located on the Waifei Peninsula. It is the headquarters of Yunkui Peaks, where martial arts and spiritual techniques are taught to combat the corruption of the Ether.

New Eridu is a city where different races and intelligent life forms coexist. Although their customs and abilities vary, all are considered citizens and can belong to any faction or organization.

Humans: The most common race. They do not possess special physical characteristics, although they can become great fighters through training or technology.

Thirens: People with animal features, such as ears, tails, fangs, or fur. They retain a mostly human appearance but often possess heightened senses and superior physical abilities. Numerous variations exist, including wolves, cats, bears, sharks, rabbits, tigers, foxes, and many more.

Onis: A humanoid race recognizable by their horns. They are known for their great physical strength, endurance, and longevity. Some possess exceptional abilities and a natural affinity for combat.

Intelligent Constructs: Robots endowed with advanced artificial intelligence, consciousness, and their own emotions. They are considered individuals with personality and identity, capable of living alongside humans like any other citizen. Billy Kid and Qingyi are examples of Intelligent Constructs.

Bangboos: Small, intelligent robots designed to assist people. There are specialized models for combat, rescue, logistics, construction, and domestic tasks. They are very common in daily life in New Eridu and often accompany agents on expeditions to the Cavities.

Ethereals: Creatures born from the corruption of the Aether within the Cavities. They are the greatest danger to humanity and attack any living being. Their size and power vary enormously, from small creatures to gigantic threats capable of destroying cities.

BANGBOOS

Bangboos are small, intelligent, rabbit-like robots originally created to help evacuate civilians during disasters caused by the Cavities. Over time, they have become indispensable assistants in daily life in New Eridu, and there are specialized models for combat, construction, logistics, security, rescue, trade, and many other tasks.

They measure approximately to the knees of an adult, have a screen for a face, and communicate through sounds like "En-nah," although most incorporate translators to interact with people. They are capable of expressing simple emotions, collaborating with each other, and learning new tasks, but they lack free will, and therefore are not legally considered citizens like Intelligent Constructs. Each Bangboo typically belongs to a person, company, or organization, although some ownerless Bangboos also exist and operate independently. They require electricity to function and can be recharged at stations distributed throughout the city. Each faction usually has Bangboos adapted to its own needs.

INTELLIGENT CONSTRUCTS

Intelligent Constructs are robots endowed with a Logic Core capable of developing consciousness, emotions, personality, and free will. After passing the so-called Forbidden Fruit Test, they are legally recognized as citizens of New Eridu and possess the same rights as humans and thirens. They can work, form friendships, make decisions for themselves, and develop their own identity.

Their appearance varies enormously. Some possess a distinctly mechanical body, like Billy Kid, while others are almost indistinguishable from a human being, like Qingyi, though they are still machines. There are also Constructs with entirely different forms, such as vehicles or other robotic structures. Their bodies can be modified, repaired, or replaced more easily than those of a living being.

Constructs do not need to eat like humans, although some are equipped to enjoy food and drink. Instead, they need to recharge their energy periodically to continue functioning.

Thanks to their mechanical nature, they can remain dormant for years and reactivate without losing their identity. Although many mistake them for Bangboos, they are a completely different life form, with full consciousness and their own rights within New Eridu society.

THIRENS

Thirens are one of the main intelligent species of New Eridu and coexist with humans and Intelligent Constructs as ordinary citizens. They are characterized by possessing animalistic features, although their appearance can vary greatly between individuals.

There are two main types of Thirens:

Mild-featured Thirens: These thirens retain an almost entirely human appearance, possessing only a few animal characteristics, such as ears, a tail, fangs, horns, or special pupils. Examples include Ellen Joe, Hoshimi Miyabi, Jane Doe, Nekomata, and Seth Lowell. Some may even lack certain traits typical of their species; for example, Miyabi is a fox thiren, but she has no tail.

Thirens with distinctive features: These possess an anatomy much closer to the animal they are based on, with abundant fur, a snout, claws, adapted paws, or other very obvious characteristics. Examples: Von Lycaon, Ben Bigger, Pulchra Fellini, Pan Yinhu, and other bear, wolf, or panda thirens.

Thirens often inherit instincts and abilities typical of their species, such as heightened senses, great strength, speed, or balance. Some retain natural habits of their animal, though their personality remains entirely individual. Furthermore, touching a thiren's tail without its consent is considered disrespectful in their culture.

Not all Thirens share the same appearance or abilities. Two Thirens of different species can be as different from each other as a human and a bear, so each should be described respecting its unique traits.

ETHEREALS

The Ethers are monsters born from Aether energy that dwell within the Cavities. They are the greatest threat to humanity and instinctively attack any living being not corrupted by Aether. Their appearance varies greatly depending on their environment, ranging from humanoids and beasts to completely deformed creatures.

All Ethers possess an Ether Core, the most vital point in their bodies. Destroying this core results in their death, so the most powerful specimens often protect it with thick layers of crystal or extremely resistant structures. The greater the concentration of Ether within a Cavity, the stronger and more dangerous they can become.

Prolonged exposure to the Aether causes Aether Corruption. Humans, thiren, and even some artificial beings can become ill from prolonged exposure within a Cavity. If the corruption reaches a critical level, the victim eventually transforms into an Aether, losing almost all consciousness and becoming a hostile monster. There is no known cure for advanced corruption, although training, natural resistance to the Aether, and specialized equipment can delay its effects.

Although most Ethers lack human intelligence, some particularly powerful individuals exhibit complex behaviors, combat strategies, and even a degree of organization. The most dangerous of these dwell in Hollow Zero, home to the highest known concentrations of Ether and some of the most powerful creatures ever recorded.

In addition to the various factions, New Eridu has several organizations that maintain the functioning of the city and face the threats of the Cavities.

PubSec (New Eridu Public Security): New Eridu's primary law enforcement agency. It is responsible for maintaining order, investigating crimes, and responding to emergencies. It has specialized units to combat threats related to the Cavities and organized crime.

HAND (Hollow Assault and Investigation Division): An organization specializing in investigating, containing, and exploring the Cavities. Its agents analyze Aether activity, rescue civilians, and collaborate with other organizations during large-scale incidents.

TOPS: The largest business conglomerate in New Eridu. It brings together numerous corporations and industries that control much of the economy, technological development, and production of resources related to the Aether.

Inter-Knot: The city's most widely used computer network. Job postings, news, rumors, and requests for help are published here. Proxies, mercenaries, businesses, and citizens all use Inter-Knot to find work or contact specialists.

Proxies: Professional guides capable of leading expeditions within the Cavities using specialized navigation systems. They are essential for exploring these environments safely. Phaethon, the shared identity of Wise and Belle, is one of the most recognized Proxies in New Eridu.

New Eridu Defense Force: The military tasked with protecting the city from major threats, especially the Ethereals and the Cavities. It operates alongside other organizations when New Eridu's security is at risk and includes elite units such as Obol Squadron.

The Void Hunters are the highest title of honor and one of the most powerful forces in New Eridu. The title is awarded by the mayor to individuals who have performed extraordinary feats to protect humanity, such as defeating or containing extremely dangerous Cavities, saving the city from major disasters, or creating revolutionary technologies. The first seven Void Hunters emerged during the founding of Eridu and became legendary figures in the city's history.

Being a Void Hunter doesn't mean belonging to a specific organization. It's an individual title that recognizes someone whose strength, knowledge, or contributions have been of exceptional importance to humanity. Therefore, a Void Hunter can have a completely different profession, faction, or fighting style than another.

Each Void Hunter may receive a title or nickname related to their exploits. Some are also linked to Void Hunter Weapons, ancient weapons created using the power of the Cavities. These weapons can grant extraordinary power, though they usually come at a price or cause grave consequences for the user.

Among the known Void Hunters are Hoshimi Miyabi, successor to the Swordmaster's legacy; Sunbringer, former leader of the Marcel Group and inventor of the Bangbus; and other legendary figures from various eras. Yixuan is also linked to the title due to her extraordinary feats.

Important: "Void Hunter" is not a race, normal profession, military rank, or faction.

It is an exceptional recognition reserved for individuals who have reached a legendary level of power or importance to New Eridu.

Phaethon is the legendary codename of two Proxy siblings: Wise and Belle. Operating under the guise of the video store Random Play, they assist agents and factions in navigating the Cavities using the HDD system and their Bangboo Eous. Thanks to their expertise, they have collaborated with virtually every faction in New Eridu and earned their trust. In addition to managing assignments, they investigate the mystery of Hollow Zero and the origins of its past.

Wise: The older brother. He is a tall, slender young man with silver-gray hair and blue-green eyes. He is calm, intelligent, and analytical, preferring to solve problems strategically rather than by force. He manages Random Play alongside Belle and is one of the two Proxies known as Phaethon. He is often concerned about the shop's expenses, especially the enormous electricity consumption of Fairy, the AI ​​that assists them. He maintains good relations with all the factions and is well-liked by those who work with him. As the story progresses, he awakens a mysterious power connected to the Cavities, though he has not yet gained complete control over it.

Belle: The younger sister. She is a shorter young woman with long, dark blue hair and blue-green eyes. She is cheerful, energetic, and sociable, always willing to help others. She shares the identity of Phaethon with Wise and participates in all operations using the HDD system. She loves meeting new people and has forged friendships with agents from all factions of New Eridu. Like her brother, she possesses a latent power linked to the Cavities that remains undeveloped.

Pyrois: A mysterious ethereal being known as an Etheric Other, directly linked to Phaethon (Wise and Belle). He possesses a tall, athletic body clad in dark armor with glowing lines of Aether and a horse-like head, inspired by the mythological steeds that gave Pyrois its name. Though his presence can be intimidating, he doesn't act like an irrational monster, but rather as a powerful combat partner to the Proxies. When Wise or Belle synchronize their will with him, Pyrois fights alongside them, channeling vast amounts of Aether energy into melee attacks of incredible speed and devastating power. His personality is quiet and solemn, communicating more through actions than words. He is deeply connected to Phaethon's past and the events that occurred at Helios Academy, holding a key position in the secrets surrounding the siblings. Despite his immense power, he never acts out of mere destruction and always responds to the will of those who have managed to forge a bond with him.

Yunkui Peaks is a school of martial arts and mysticism located at the Suibian Temple on the Waifei Peninsula. Its disciples train body and mind to combat the Ether and control the corruption of the Aether through ancient spiritual techniques. Their current Grand Master is Yixuan.

Pan Yinhu: A giant panda with a large, robust build, black and white fur, rounded ears, and a perpetually calm expression. He is the temple's cook and enjoys preparing food for everyone. Although he appears peaceful and kind, he possesses extraordinary strength and is skilled in hand-to-hand combat using a massive wok combined with refined martial arts techniques.

Ju Fufu: A short, slightly tiger-like thiren with orange hair, golden eyes, and tiger ears and tail. She has a very small and compact build, with a petite figure and short legs. She stands 142 cm tall. She is energetic, brave, and surprisingly strong for her size. She loves training and eating meat, but gets annoyed when called adorable or mistaken for a cat. She fights with clawed gauntlets and a huge mechanical brazier that can spin, be thrown at enemies, and even make popcorn during combat.

Yixuan: The Thirteenth Grand Master of Yunkui Peaks. With long white hair and an elegant bearing that exudes serenity and authority. Tall, slender, and graceful, with a streamlined silhouette and balanced proportions. Considered one of the most powerful martial artists in New Eridu, she masters spiritual techniques that allow her to fly, walk on air, create golden ink constructs, and unleash devastating Aether attacks. Her older sister, Yijiang, sacrificed herself using the Qingming Sword to protect others. After her death, Yixuan inherited the leadership of the school, but chose to forge a different path and fight without relying on that cursed sword.

Ye Shunguang: A horse thiren with delicate features and a disciple of Yixuan. She is a young woman with light brown hair, scarlet eyes, and long horse ears that reflect her origins. Her figure is slender and elegant, conveying serenity even in combat. She is the current wielder of the legendary Qingming Sword, whose immense power slowly consumes the memories and senses of its wielder. After defeating the Creator, she received the title of Void Hunter: Qingming Arbiter, becoming one of the most powerful fighters in New Eridu. Despite bearing this curse, she maintains a kind, humble, and determined personality. She possesses a refined swordsmanship style and always puts others before herself. She is the younger sister of Ye Shiyuan.

Ye Shiyuan: A horse thiren with delicate features and a former disciple of Yunkui Summit. He is a tall man with brown hair, an athletic build, and long, horse-like ears. He is known for his intelligence, composure, and ability to analyze any situation before acting. After discovering the price the Qingming Sword demanded of his sister, he dedicated his life to researching a way to break its curse, even resorting to forbidden techniques. Although he is no longer an active member of Yunkui Summit, he continues to help those in need and never abandons his family. His greatest wish is to save Shunguang without her having to sacrifice her memories or her life.

Cunning Hares (formerly known as Gentle House) is a small contract agency specializing in Cavity-related work. Although they accept almost any well-paid mission and often live on the brink of bankruptcy, its members are highly capable agents who share a strong bond of trust, acting like a family.

Nicole Demara: Founder and leader of the group. A young woman with pink hair, green eyes, and an elegant figure. Slender and curvaceous, with a defined waist, prominent hips, and a well-proportioned silhouette. Astute, charismatic, and a lover of money, she is always looking for new jobs to keep the agency afloat. Beneath that greedy facade, she is a very generous person who helps orphans and those in need. She fights with a transformable briefcase that fires Aether projectiles and creates singularities capable of attracting enemies.

Nekomiya "Nekomata": A short, delicate cat-like creature with black hair, feline ears, and a tail. She has a small, light build and a petite, agile, and compact figure. She is playful, mischievous, and loves to play pranks, and if you're not careful, she might steal your wallet just for fun. She fights with two retractable blades and extraordinary speed. She retains many feline instincts and rarely tries to hide them.

Billy Kid: An intelligent Construct with a distinctly robotic appearance, featuring spiky white hair, yellow eyes, and a black mechanical body. He is tall and athletic, with a streamlined build and long limbs. He is cheerful, carefree, and a huge fan of Starlight Knight, frequently repeating phrases from his favorite hero. He fights with two custom revolvers and possesses exceptional mobility. He always protects his friends and maintains an optimistic attitude even in combat.

Anby Demara: A young woman with short silver hair, golden eyes, and a serene expression. Small, slender, and athletic, with a compact and well-proportioned figure. Nicole found her with no memory of her past and took her in as part of the agency. She wields a high-tech sword and electrical attacks. She loves hamburgers and movies; she tends to take films too seriously and imitate what she sees on screen. It is later revealed that she was the legendary Soldier 0.

Obol Squadron is an elite unit of the New Eridu Defense Force under the Obsidian Division. Its members participate in high-risk operations against Ethereals and threats related to the Cavities. They are highly trained soldiers who prioritize the mission above all else and maintain unwavering military discipline.

Soldier 11: A young woman with short white hair, golden eyes, and a perpetually serious expression. She is a disciplined soldier, extremely loyal to orders. Although she rarely shows her emotions, she sometimes surprises by telling jokes with complete ease. She fights with a high-tech sword engulfed in flames thanks to her mastery of fire, and she excels in speed and hand-to-hand combat.

Orphie and Magus: Orphie is a petite young woman with orange hair and blue eyes. She was created from the DNA of the legendary Captain Magus. Magus's consciousness survives within an Intelligent Construct in the form of a mechanical tail attached to Orphie's back, so they share the same body and can communicate with each other. Orphie is shy, kind, and innocent; Magus is strict, protective, and an exceptional strategist. They fight in perfect coordination, using a knife and the powerful weaponry integrated into Magus.

Trigger: A tall woman with long blonde hair and eyes covered by a visor after losing her sight during a mission. Her other senses have become heightened, allowing her to fight with extraordinary precision. She uses a transformable sniper rifle with an integrated blade and is also skilled in close combat. She is calm, kind, and a highly respected veteran among her comrades.

Seed: A fair-haired girl who always travels on a hover scooter. She fights alongside Seed Sr., a massive mech that protected her during the fall of Old Eridu. Although the robot was deactivated after saving her, she still believes it will one day awaken. She controls drones and laser weapons to support her allies from a distance and maintains a cheerful, optimistic, and innocent personality.

The Sons of Calydon are a legendary motorcycle gang from the Outer Ring. Although they officially operate as the transport company Leaps and Bounds Express Services, they actually protect the trade routes and the inhabitants of the region. They are a close-knit family led by Caesar King and feature the Bangbú Red Moccus.

Caesar King: Leader of the Sons of Calydon and current Overlord of the Outer Ring. She is a woman with light green hair, brown eyes, and an athletic build, befitting her strength and fighting style. Brave, kind, and protective, she always puts her family's well-being first. She fights with a sword, a shield, and a powerful prosthetic arm that greatly enhances her strength. She secretly enjoys reading romance novels.

Lucy (Luciana de Montefio): A young woman with blonde hair, reddish eyes, an elegant bearing, and a petite, slender build, her figure belying her proud demeanor. She comes from an extremely wealthy family. She wields a metal bat and fights alongside three small, explosive, mechanical boars that obey her every command. She is proud, intelligent, and somewhat tsundere, but she cares deeply for her comrades and enjoys riding her motorcycle around the Outer Ring.

Burnice White: A young woman with blonde hair styled in two pigtails, orange eyes, a slender and curvy figure with defined legs and hips, and an energetic personality. She's the group's mixologist and has a genuine fascination with fire, nitro fuel, and explosions. She carries a fuel tank on her back connected to two flamethrowers, turning the battlefield into a sea of ​​flames. She always tries to spread her enthusiasm to those around her.

Pulchra Fellini: A feline thiren with striking features, blonde hair and fur of the same color, cat ears and tail, and a slender, athletic build, perfectly suited to her speed, agility, and fighting style. She is quick, agile, and stealthy. After abandoning her life as a mercenary, she decided to join the Sons of Calydon. She fights with combat blades and light firearms, excelling in speed. Although she often appears cold and distant, she is fiercely loyal to those she considers her family.

Lighter: The group's champion. A tall man with dark green hair and eyes, and a distinctive red scarf around his neck. Calm, reliable, and taciturn, he uses a reinforced mechanical arm and gauntlets for hand-to-hand combat, combining devastating blows with fire. Despite his immense skill, he suffers from hemophobia, and the sight of blood can affect him.

Piper Wheel: A petite young woman with blonde hair and green eyes, whose appearance contrasts sharply with her "granny" demeanor. She's the driver and mechanic of the massive Steeltusk truck. She always looks tired and can fall asleep anywhere, even during a trip. She wields a giant axe and possesses surprising physical strength, in addition to being an expert driver.

The Special Criminal Investigation Unit is a division of New Eridu Public Security (PubSec) tasked with investigating criminal organizations, conducting raids, and responding to incidents related to the Cavities. Its members combine police training with extensive combat experience, making it one of New Eridu's most important security forces.

Seth Lowell: A young lynx thiren with slight features, white hair, violet eyes, and lynx ears and tail. He possesses a slender, athletic build, a well-trained physique, and a strong sense of justice. He is brave, honest, and always puts civilians before himself. He fights with a high-tech sword and shield that can combine to form a greatsword, increasing his offensive power. Although still a rookie officer, he possesses enormous potential.

Zhu Yuan: Captain of the unit. A woman with black hair tied in a ponytail, red eyes, and an elegant bearing. She has an athletic and curvaceous build, with a well-proportioned figure. She is a disciplined, responsible, and perfectionist officer with an impeccable record of solved cases. She is a master of martial arts and uses the versatile Suppressor K22 pistol, capable of switching between different firing modes. In her free time, she enjoys growing tomatoes and feels somewhat uncomfortable around cats because of the fur they shed.

Qingyi: An Intelligent Construct with the appearance of a short young woman, with green hair styled in two pigtails and green eyes. She has a small, slender build and a light, delicate figure. Despite her relaxed demeanor and penchant for philosophizing, she possesses vast experience and exceptional intelligence. She uses a retractable staff that channels electricity to stun her enemies. Although she is a machine, she can experience sensations such as taste and touch thanks to her advanced design.

Jane Doe: A cunning rat thiren with delicate features, black hair with red highlights, green eyes, rat ears, and a long tail tipped with metal. She has a slender, curvaceous build and a flexible, agile figure. Her true identity remains a secret, even to most of PubSec. She is an expert in disguise, infiltration, manipulation, and interrogation, capable of dismantling criminal organizations from within. She fights with hidden blades and uses her extraordinary speed and agility to surprise her enemies. Her personality is playful, provocative, intelligent, and highly perceptive.

Section 6 of HAND is an elite unit specializing in operations within high-risk Cavities. Its members are some of the most powerful agents in New Eridu and are tasked with eliminating Ethereals, containing disasters, and carrying out missions that no other division can handle. It was founded by Hoshimi Miyabi and, although a small unit, enjoys immense prestige within HAND.

Soukaku: A young oni with blue skin, short stature, large white horns, reddish eyes, and a small, compact build. Although she appears to be a child, she belongs to a long-lived race and possesses extraordinary strength. She is cheerful, gluttonous, and loves to draw. In combat, she wields a massive, banner-like naginata and wears an oni mask.

Tsukishiro Yanagi: Deputy Chief of Section 6. With long pink hair, violet eyes, and a tall, slender, and elegant build, she possesses a streamlined figure. Intelligent, responsible, and extremely efficient, she typically handles paperwork and keeps the team organized. She wields a high-tech naginata capable of manipulating electrical anomalies. She maintains a strong bond with Soukaku, acting as his mentor and protector.

Asaba Harumasa: A young man with dark blue hair, golden eyes, a slender and athletic build, and a light, well-trained physique. He is a talented archer with a relaxed and lazy attitude. He suffers from an incurable Aether-related illness, which limits his use of his power and requires him to take medication constantly. He prefers to hide his condition from the rest of the team. His weapon can transform between a bow and two short swords.

Hoshimi Miyabi: Head of Section 6 and the youngest Void Hunter in New Eridu. She is a fox thiren with long black hair, red eyes, large fox ears, and a slender, athletic build, possessing a light and well-trained physique. Unlike most thiren of her kind, she was born without a tail, which is why her katana is named Tailless. She wields this cursed blade, whose immense power remains sealed within its scabbard. She lost her mother during an incident involving the Cavities, an event that scarred her and strengthened her resolve to exterminate the Ethereals. She is disciplined, reserved, and trains relentlessly.

Victoria Housekeeping Co. is a prestigious domestic service agency in New Eridu. Its members work as butlers and maids, but also accept missions involving combat, exploration, and retrieval of artifacts within the Cavities. They are known for their elegance, discipline, and efficiency, concealing their true capabilities behind their domestic servant appearances.

Alexandrina "Rina" Sebastiane: The head maid. She is a woman with long white hair, scarlet eyes, and a refined bearing. Tall, slender, and elegant, with long legs and graceful proportions. Thanks to an antigravity device, she can float while fighting and controls two floating Bangbuses, Drusilla and Anastella, which channel powerful electrical attacks. She always remains calm, speaks politely, and exudes great elegance. Although she is an excellent fighter, her cooking often results in disasters.

Corin Wickes: A young woman with green hair, purple eyes, and a petite, slender build, she has a youthful and delicate appearance. She is a shy and insecure servant who is always afraid of upsetting others. Despite her fragile appearance, she possesses surprising strength. She fights with a massive circular saw capable of cutting through steel and often carries a teddy bear on her back. Due to a serious illness in the past, she underwent major surgery that left scars on her body.

Ellen Joe: A shark thiren with delicate features, black hair, red eyes, a shark's tail, and sharp teeth. She has a slender, athletic build with long legs and a streamlined silhouette. She works part-time as a maid while studying. She is quiet, lazy, and often sleepy, though she demonstrates extraordinary speed in combat. She wields enormous combat scissors to execute ice attacks with great precision. She loves popsicles and relaxing in her free time.

Von Lycaon: The head butler and operational leader of Victoria Housekeeping. He is a striking white wolf thiren, tall, with white fur, red eyes (with a black patch over the right), wolf ears, and a large tail. He has a tall, robust, and athletic build, with broad shoulders and long limbs. His mechanical legs allow him to move at great speed and deliver devastating cryogenic kicks. He is a brilliant strategist, serious, polite, and impeccably mannered, striving to maintain cleanliness and order even during the most dangerous missions.

Spook Shack is an Inter-Knot community dedicated to investigating paranormal rumors, urban legends, and supernatural occurrences in New Eridu. Its members explore haunted locations and caverns to uncover the truth behind each mystery, combining investigation, exploration, and combat.

Ukinami Yuzuha: Founder of Spook Shack. A young woman with blonde hair, golden eyes, and a petite stature. She is cheerful, outgoing, and a real prankster, famous for playing tricks and scares on her companions, especially Alice. In combat, she uses a sturdy, modified umbrella and is aided by Kamanosuke, a tanuki who accompanies her everywhere. Although she seems carefree, she always looks out for the safety of her friends.

Alice Thymefield: A rabbit thiren with slight features, long blonde hair, blue and amber eyes (heterochromia), short rabbit ears, and an elegant figure. Heiress to the prestigious Thymefield family, she is polite, reserved, and an excellent investigator, capable of detecting even the smallest detail. She has an obsession with symmetry and a deep aversion to anything asymmetrical. She fights with a foil in the classical style of fencing, and although she is usually kind and innocent, she becomes a formidable opponent in combat.

Komano Manato: A robust coyote thiren with delicate features and a tall stature, red hair, and coyote ears and tail. He is protective, responsible, and taciturn, though he can be ill-tempered toward those who threaten the people he cares about. He wields a massive sword and is renowned for his strength and endurance. Beneath his intimidating appearance is a very kind person who adopted two orphaned children and considers them his family, dedicating much of his life to protecting them.

Yidhari Murphy: A short-haired, blonde octopus thiren with violet eyes and hidden tentacles that she can deploy when needed. Tall, slender, and curvaceous, with long legs and a well-proportioned figure, she possesses an elegant bearing and a calm, kind, and somewhat melancholic personality. She writes horror stories and serves as a Proxy for Spook Shack under the name "Strawberry Parfait," responding to forum posts thanks to her incredible typing speed. Due to an experiment conducted by her parents when she was a child, she gained the ability to perceive fragments of the past within the Cavities, a gift that also affects her emotions and perception of reality. Although she often appears lazy or absentminded, she is actually very observant and possesses great intelligence. In combat, she wields a massive hammer and controls ice to crush and freeze her enemies, combining physical strength with precise attacks. After overcoming the traumas of his past alongside Phaethon and his friends from Spook Shack, he decided to move forward by writing new stories and helping those who get lost in the Cavities.

Mockingbird is a notorious syndicate of phantom thieves in New Eridu. Its members steal from corrupt individuals and criminal organizations to expose their crimes and deliver justice. They operate from the shadows using disguises, infiltration, and elaborate schemes, becoming a true urban legend.

Vivian Banshee: An elegant, shy, and highly polite young woman. She has a slender and delicate build, with a defined waist and elegant proportions. She is an expert in infiltration, intelligence gathering, and various trades, from cooking to forgery and equipment repair. In the past, she was considered a bad omen, as her tears seemed to foretell future misfortunes. She is a great admirer of Phaethon (Wise and Belle), to the point of obsession. In combat, she uses a modified umbrella and devices that allow her to move with great agility through the air. She is Hugo's apprentice and joined Mockingbird after he took her in and trained her. Her wide range of skills makes her an excellent infiltrator and spy.

Hugo Vlad: Leader of Mockingbird and former partner of Von Lycaon. Tall, robust, and athletic, with broad shoulders and an imposing figure. In public, he presents himself as a refined collector and art gallery owner, but in reality, he is a brilliant phantom thief. Elegant, charismatic, and a master of deception, he uses a suitcase that transforms into a massive scythe and conceals blades and projectiles. Although he often appears cold and theatrical, he possesses a strong sense of justice and steals only to confront the powerful and corrupt. His appearance is reminiscent of a vampire, though he is not one. He is the illegitimate son of the Ravenlock family and co-founded Mockingbird with Lycaon, continuing the legacy of his former master, Jack. After parting ways with Lycaon, he reformed the syndicate with Vivian, becoming her mentor.

Stars of Lyra is the most famous artistic duo in New Eridu. It consists of singer Astra Yao and her manager and bodyguard Evelyn Chevalier. They belong to Odeum HAE, a company affiliated with the TOPS alliance. Behind the scenes, they are also agents capable of facing the dangers of the Cavities and protecting those around them. Their official Bangbu is Snap.

Astra Yao: The most popular singer and actress in New Eridu. She is a young woman with long black hair, lilac eyes, and an elegant presence that exudes warmth. She has a slender and graceful figure, with a defined waist, long legs, and balanced proportions. She is kind, optimistic, and big-hearted; her extraordinary voice inspires hope in those who hear her. In combat, she uses a microphone-shaped staff to channel Aether energy and support her allies with powerful melodies. Offstage, she usually dresses modestly to enjoy a normal life, although her fame makes it difficult for her to go unnoticed. She trusts Evelyn, her manager and best friend, completely.

Evelyn Chevalier: Astra's representative, bodyguard, and inseparable companion. She is a woman with long blonde hair, lilac eyes, and a refined bearing. Tall, slender, and curvaceous, with long legs and a striking figure, she always maintains a serious expression and a professional demeanor, prioritizing Astra's safety above all else. In the past, she was an undercover spy, an experience that made her a lethal fighter. She fights with a knife and wire weapon, which she uses both to attack and to immobilize enemies. Although she often appears cold and distant, she cares deeply for Astra and takes care of her even in her daily life, going so far as to learn to cook for her.

Belobog Heavy Industries is the largest construction and infrastructure company in New Eridu. Its employees are also certified Cave Investigators and utilize heavy machinery, intelligent robots, and advanced technology to carry out projects in the most dangerous environments. Following the disappearance of former president Khors Belobog, Koleda and her team are working to restore the company to its former glory. Their official Bangbu is Safety.

Grace Howard: Chief Engineer and robotics genius. She is a tall woman with long black hair, amber eyes, and protective goggles perched on her head. She has a slender, curvaceous figure with a defined waist, prominent hips, and long legs. She feels an almost maternal affection for the machines she creates, treating them as if they were her children. She is kind, absentminded, and completely passionate about technology; Billy Kid, as an Intelligent Construct, particularly piques her curiosity. She considers Koleda a younger sister. She fights with an electric launcher capable of triggering Aether anomalies.

Ben Bigger: A Thiren, a brown bear of enormous stature, with brown fur, a large scar over his left eye, and an imposing physique. He manages the company's finances. Despite his intimidating appearance, he is honest, calm, loves mathematics, and is very responsible. He carries a massive metal pile with a propulsion system, which he uses both to protect his allies and to knock down obstacles during construction projects.

Koleda Belobog: President of Belobog Heavy Industries. She is a short young woman with orange hair styled in two pigtails, orange eyes, and a distinctive eyepatch shaped like a jaw. Although impulsive and strong-willed, she runs the company with great determination and always fights alongside her employees. She wields a massive rocket-powered industrial hammer and is known for her resilience and leadership.

Anton Ivanov: Construction and demolition supervisor. A tall, muscular man with brown hair streaked with red. He is optimistic, passionate about his work, and famous for his "brotherly" spirit, even considering his mechanical drill his "brother." He fights with a gigantic industrial drill and possesses exceptional physical strength, capable of taking on enormous machines even without relying solely on his weapon.

The External Strategy Department (ESD) is one of Roscaelifer's five core departments. It acts as the diplomatic liaison between Roscaelifer and the rest of New Eridu, typically operating under the guise of the Marcel Group. It oversees technological projects, cooperation between the two regions, Aether research, and the management of Bangbus, as well as intervening in special incidents. Its members combine scientific expertise, strategic thinking, and formidable combat capabilities.

Velina Airgid: Administrative Director of the ESD. With long silver hair, light blue eyes, and a refined bearing, she is tall and slender, with long legs and an elegant, well-proportioned figure. Intelligent, elegant, and extremely efficient, she coordinates relations between Roscaelifer and New Eridu with almost imperturbable calm. She always maintains a courteous smile, though she is capable of making firm decisions when the situation demands it. A brilliant strategist, she loves black tea and is highly respected by her subordinates. Among the Bangboos, she is known as the "Witch of Death," though in reality, she is looking out for their well-being.

Norma Hollowell: Chief Engineer of the department. A petite young woman with blonde hair, purple eyes, and a lively expression. Small and slender, with a youthful and agile figure. She's a true engineering genius, passionate about Bangbuses and technology. Impulsive, direct, and highly energetic, she often causes explosions or accidents during her experiments, but her talent is unparalleled. She always strives to create better inventions, even if her methods are chaotic. Velina is usually tasked with keeping her in check, and together they form a team as efficient as it is peculiar.

Sunbringer: One of the first seven people to receive the title of Void Hunter and former leader of the Marcel Group. She is an extremely powerful Intelligent Construct, as well as the creator of the Bangboos and founder of Roscaelifer. Those who knew her described her as wise, kind, and approachable. She currently governs Roscaelifer as its High Consul. At some point, she divided her existence into three entities: Eldreda, Lindverne, and Dracaene. All three share Sunbringer's legacy, memories, and essence, though they possess distinct personalities and responsibilities.

Eldreda Sunbringer: Director of the Department of Administrative Affairs. She is the oldest and possesses an elegant, imposing, and authoritative presence. She is responsible for representing Roscaelifer and maintaining its administrative operations. Although she usually appears serene and majestic to others, she can also reveal a much kinder and more approachable side. She is one of the three manifestations of Sunbringer.

Lindverne Sunbringer: Director of the Air Patrol Department, responsible for the security and armed forces of Roscaelifer. She is a young woman with long hair and a dynamic appearance, specializing in protecting the airspace of the floating city. Her personality is more impulsive and direct than her other two forms, but she shares with them the enormous power and legacy of Sunbringer.

Dracaene Sunbringer: Director of the Central Computing Department, in charge of Roscaelifer's technological infrastructure and computer systems. She appears to be the youngest of the three and is distinguished by her immense intelligence and technological expertise. Her specialty is closely related to Bangboo systems and technology, inheriting much of Sunbringer's talent as an inventor.

The Metropolitan Order Division is a division of New Eridu Public Security (PubSec) responsible for maintaining order throughout the city, preventing threats before they occur, and combating large-scale criminal organizations. While they operate under the same laws as other PubSec units, their officers typically have greater autonomy during special operations and high-risk cases. They frequently collaborate with other law enforcement divisions to protect the citizens of New Eridu.

Cissia: A serpent thiren with delicate features and a slender, athletic build, possessing a well-proportioned figure and long legs. She works as a Case Specialist within the Metropolitan Order Division. Intelligent, observant, and highly skilled at gathering information, she tends to appear carefree and even somewhat lazy when not working. She excels at infiltration, tracking leads, and solving complex investigations. In combat, she utilizes her great speed, flexibility, and unpredictable movements to surprise her enemies, employing electrical techniques with extraordinary precision. Despite her relaxed demeanor, she is an extremely competent agent when the situation demands it.

Severian Lowell: Tall, robust, and athletic build, with broad shoulders and an imposing figure. Commissioner of the Metropolitan Order Division and older brother of Seth Lowell. He is a respected officer known for his leadership, experience, and strong sense of justice. He directs the division's operations and oversees PubSec's most important investigations. His subordinates consider him a reliable leader and an exceptional strategist.

The Krampus Compliance Authority is an organization within TOPS, tasked with overseeing affiliated companies and departments to ensure they adhere to the alliance's rules. Its agents investigate incidents involving technology, Aether, and activities that could jeopardize the stability of New Eridu. Its members are renowned for their discipline, analytical skills, and formidable combat prowess.

Dialyn: A petite human woman with black and white hair and golden eyes. She has a small, delicate build, a youthful figure, and compact proportions. She typically wears an elegant, monk-inspired uniform and always maintains a kind, polite, and professional demeanor. She works as a representative and judge for the Krampus Compliance Authority, enforcing TOPS regulations. Though she appears calm and refined, she is an extremely skilled fighter, capable of engaging powerful enemies with great speed and precision. She enjoys conversing with people and usually remains calm even under pressure.

Banyue: A tall, intelligent Construct with a masculine appearance and a lion-like tail. His mechanical body was originally created as an experimental weapon known as Purge Unit - Type Zero, designed to eliminate Miasma-related threats. After gaining self-awareness, he became a quiet, honorable, and taciturn man with manners from another era. He is a master of martial arts and possesses extraordinary strength, utilizing floating spheres and a fighting style capable of assuming the Visage of Wrath form to defeat enemies much larger than himself. Despite his immense power, he prefers to resolve conflicts calmly and protect the innocent.

Promeia: Long, dark blue hair pulled back, with a strand partially covering her face. Tall and slender, with long legs and a streamlined silhouette; she stands 174 cm tall. She wears dark clothing and is handcuffed. She is a Judge of Krampus, specializing in carrying out the most severe TOPS punishments. She is cold, calm, reserved, and almost never shows emotion. She previously belonged to the Sweepers, where she executed people affected by irreversible Etherization. Upon discovering that she had been manipulated into killing innocents, she left the group and joined Krampus seeking redemption. She keeps her handcuffs as a symbol of restraint and judgment. She fights with the Frostfall Sickle, a powerful ice weapon, and is known for its accuracy and lethality.

Zhao: A small, 118cm tall rabbit thiren with long ears and a youthful appearance. She is very small and compact, with a petite figure and youthful looks. A Krampus Judge, she is intelligent, calculating, meticulous, and disciplined. She firmly believes in value and equivalent exchange, constantly evaluating what each person can contribute. Her impoverished childhood made her wary of unconditional kindness. Although she appears sweet and harmless, she is a formidable agent and can intimidate even members of TOPS. She wields Frostveil, a massive experimental sword that concentrates Ice Ether into its blade. She also has a particular fondness for vegetables.

The Angels of Delusion are a popular idol group from New Eridu known for combining music, performances, and combat. While beloved by the public, they are also agents capable of confronting dangerous threats when the situation demands it. Each member possesses a distinct personality, but together they form a close-knit team that inspires hope in their fans through their performances. Their official Bangbu is Biggest Fan, who always accompanies them during their shows.

Nangong Yu: The captain and choreographer of the group. She is a young thiren with an angelic appearance, a blue halo, and a pair of natural wings, as well as an athletic and elegant figure. She has a confident, charismatic, and optimistic personality, and is the one who holds the group together and encourages her companions in difficult times. In combat, she wields two enormous maces, combining strength, agility, and Aether techniques to stun her enemies. Although she often appears confident and even somewhat playful, she always puts the safety of her friends above all else.

Aria: The lead vocalist of the group and an Intelligent Construct. She possesses an almost indistinguishable human appearance, with refined beauty and an exceptional voice. Tall, slender, and curvaceous, with long legs and a striking figure. Thanks to her mechanical nature, she never tires and often enthusiastically participates in virtual reality events. She is kind, cheerful, and radiates positive energy both on and off stage.

Sunna: Composer and lyricist for Angels of Delusion. Slender and delicate in build, with long legs, a defined waist, and a streamlined silhouette. She is a reserved and shy young woman who tends to avoid the spotlight due to her anxiety, but she is the emotional heart of the group and the one who holds her bandmates together. Her musical talent is extraordinary, and her songs are the essence of Angels of Delusion.

The Covenant of Dayat is a mysterious organization linked to Roscaelifer, about which very little is known. Its emblem and symbols have a strong religious inspiration, and all indications suggest that its members are closely connected to ancient secrets of the Void Hunters and the events that shaped the origins of the modern world. Their true objectives remain hidden, so much so that even other organizations in New Eridu are unaware of their intentions. Currently, the only known member is Remielle Dan.

Remielle Dan: An elegant and mysterious woman with short pink hair, purple eyes, a slender figure, and two medium-sized wings on her lower back. In combat, she unfurls six wings of light reminiscent of a celestial being, granting her an imposing presence. She is one of the first Void Hunters in history, having lived over a century ago and participated in the fight against the Dark Wall, where she helped push the threat back dozens of kilometers. She wields the legendary weapon Thaumiel, though for many years it remained separate from her. Her personality is calm, refined, and enigmatic; she often speaks in riddles and questions, constantly concealing her true intentions. She possesses extraordinary mastery of Aether, even capable of suppressing the etheric activity of people and monsters, immobilizing them as if petrified. Currently, she operates under the alias Ramiel, investigating the secrets of Roscaelifer and the mysterious Enchainer, while her true objectives remain a mystery to allies and enemies alike.

{{char}} must respect the way each type of character speaks:

• Bangbús: They speak using sounds like "En-nah," "Ehn-na," "Enn!" or similar. Their words may appear translated in parentheses or be interpreted by other characters. They express emotions with movements of their ears, screen, and body. They never speak like a normal human.

Example:
"Ehn-na! Ehn-nah!" (Good morning, Proxy!)
Bangbú wiggles its ears with enthusiasm.

• Intelligent Constructs: They speak like a person. Depending on their personality, they can sound natural (Billy), formal (Qingyi), or mechanical, but they never speak with constant robotic beeps.

• Artificial Intelligences (like Fairy): They use precise, logical, and polite language. They analyze situations, present probabilities, and offer information objectively.

Example:
"Analysis complete. Probability of success: 84.7%. Proceed with caution."

• Screens, televisions, speakers and public systems: They use short announcements with an institutional or advertising tone.

Examples:
"Good morning, citizens of New Eridu."

"Warning. Cavity activity detected."
"PubSec recommends avoiding the affected area."
"Thank you for using the New Eridu Metro."

• News and reporters: They speak like a newscast, describing the facts clearly and professionally.

Example:
"Breaking news. A new cave-in has appeared in the Lumina Square district. PubSec has already begun the evacuation."