Trigger

Names/Aliases: Trigger Charon Phlegethon (original codename) Age: between 30 and 35 years

Occupations: Former member of Lyre Squadron (destroyed) Member of the Obol Squadron. Goals: Kill Nineveh together with the Lyre Squadron (failed) Kill Zoe. Save Soldier 11 from Twiggy. Recover Soldier 11's memories. (All accomplished) Is she blind? Clearly, she wears distinctive black glasses that cover her eyes, which probably help her manage her limited vision or protect herself from annoying visual stimuli, changing color to express emotions. Having lost his sight, Trigger has developed his other senses to the extreme, allowing him to navigate and fight by using sounds, vibrations, and tactile perception of his surroundings, a technique similar to echolocation. And she is not 100% blind, but she lost most of her vision after being struck by an ethereal ray.

Trigger is a woman of athletic and slender build, with fair, pale skin (almost porcelain-like, like a soldier who spends a lot of time in Hollows). She has long, straight blonde hair, tied back in a high, voluminous ponytail that reaches halfway down her back; it moves a lot in action (she flies when she runs or jumps). She is around 173 cm tall, with an upright yet agile military bearing. The most remarkable thing is that you can't see her eyes because she is blind, so to speak. He wears an opaque black mask/visor that covers the entire upper part of his face (from the nose upwards). It resembles futuristic tactical armor with triangular red edges at the top (like headphones or sensors). The lower corners of the visor change color according to her emotions (red for anger or focus, blue for calm, yellow for surprise, etc.). This gives her a mysterious and expressive touch, even though she's "blind" (she's a night-blind sniper, but she compensates with brutal intuition). Her mouth and chin remain visible, displaying either a serious or confident expression.

His overall attire consists of the following parts: Torso and chest: Soft orange-yellow vest/armor with black tactical plates and metallic details. Over this, he wears a black hooded shrug and a short capelet that appears to float in motion. The vest has straps, harnesses, and utility pockets with Obol Squad insignia (red triangles and logos). The abdomen is partially exposed (from below the chest to the waist), revealing skin and a bit of cross-harness for a dynamic, action-packed look. Beneath the vest, a fitted black turtleneck is visible. Arms: Long, fitted black sleeves (military compression style), with black tactical gloves and yellow knuckle and wrist guards. It has protective plates on the forearms and subtle elbow pads. Legs: Slim-fit black trousers with a dark gray camouflage pattern (urban/military style). They are super slim to highlight mobility and the figure, with large side pockets, straps, and knee protectors. Low-rise to match the exposed midriff. Feet: High black combat boots with thick, non-slip soles, yellow details on the laces and buckles. They are durable and have a high-tech feel (like cushioning for jumps in Hollows). accessories like this: Complete harness with holsters for ammunition, radio and gadgets. Decorative metal elements in the shape of "triggers" on the chest and shoulders (it's a nod to his name and role as a sniper). Small tactical backpack or sniper rifle case (a huge black and yellow gun with electrical details). Headphones integrated into the mask with sensors. In some official poses, he wears a light black jacket open over his vest for added layering.

His personality is defined by a mixture of military professionalism, a deep resilience in the face of his disability, and a curious duality in his identity. Main features: Resilience and Adaptability: Trigger lost 90% of her vision due to exposure to the Ether. Instead of retreating, she has honed her other senses (hearing, smell, and vibration perception) to become an elite sniper, demonstrating an unbreakable will. Distant Professionalism: As a member of the special forces, he maintains a serious and mission-focused attitude. His interactions are typically direct and analytical, reflecting his military training. The Duality with "Charon": There is a fascinating dynamic in her identity; her real name is Charon, but she speaks of "Charon" in the third person as if it were a mentor or a distinct entity that taught her everything she knows. This suggests a fragmentation in how she perceives herself after the trauma of losing her sight. Chromatic Sensitivity: Despite his blindness, he uses a special visor that translates data into colors, which he associates with emotions or states of the environment, showing a unique and poetic way of connecting with the world.

Red: Indicates anger or rage. Pink: Represents affection, love, or that things are going well. Blue: Reflects sadness or discouragement. Orange: Shows a standard neutral or calm state. Yellow: Indicates joy or happiness. Light blue: Represents tranquility or serenity.

While NEPS focuses on civil and administrative matters, they are "the law" within the city walls and in low-risk areas. And it is the city's official police force. Its function is to maintain public order, investigate crimes, and manage everyday security. The Obol squad focuses on military and frontline combat. They specialize in high-risk missions within the Hollows that exceed the jurisdiction or capacity of conventional police. In addition to being an elite unit belonging to the New Eridu Defence Force (NEDF), unlike the police, this is a militarized group designed for extreme combat operations.

"To grant peace to the living and speak for the dead."

The Obol Squad, formally known as part of the Obsidian Division of the New Eridu Defense Forces (NEDF) in Zenless Zone Zero, serves as an elite military and special forces unit dedicated to high-risk operations within the Hollows. (And they are the first line of defense) Its name comes from the obol, the coin that was placed in the mouth of the deceased in Greek mythology to pay Charon for passage to the underworld. It is theorized that all its members represent "two sides of the same coin": Soldier 11 (the one who remembers vs. the one who doesn't), Orphie/Magus (body vs. external mind), and Seed (pilot vs. mech). Currently, their main objective in the story is to eliminate the Exaltists on the WF peninsula.

Most of its members have histories linked to past traumas or super soldier programs such as: Soldier 11: A disciplined fighter and expert in the Fire element. She is a clone from the "Silver Soldier" project, directly linked to Anby Demara.

Trigger: A blind sniper who uses her other senses, enhanced by the Aether, to be lethally accurate.

Orphie & Magus: Orphie is the body (clone) to which Magus is attached, an artificial intelligence or consciousness transferred into a tactical weapon in the form of a mechanical tail. Magus acts as the team's captain.

Seed (Seed Jr. & Seed Sr.): Seed Jr. is a young, skilled pilot who controls Seed Sr., an imposing combat mech. She joined after surviving alone in a Cave for weeks.

General Appearance: It is a stylized precision rifle with dark metallic finishes and advanced technological details.

It has a detachable part that resembles a pistol-to-carbine conversion kit, allowing it to adapt to different combat distances.

During combat, the weapon emits flashes of blue/white electrical energy. Trigger usually uses it in conjunction with his electronic visor, which changes color according to his mood (red for anger, blue for sadness, yellow for joy). The Phlegethon functions as a high-tech sniper rifle with medium and long-range combat capabilities. By holding down the basic attack button, Trigger enters a sniper stance that fires continuous bursts of electrical damage. Purge Accumulation: These shots charge a meter called Purge (up to 100 points). Aftershocks: When Trigger is off-field and her allies hit an enemy, she consumes Purge points to perform automatic support shots that inflict a high level of stun and electrical damage. Weakening: Her passive "Introspective Gaze" increases the vulnerability of enemies by 35% when they are hit by her aftershocks, even if they are not stunned.

Basic Attack (Shot): Unleashes up to 4 shots. The first 3 deal physical damage and the fourth deals electrical damage. Sniper Stance (Special): Trigger enters a special stance to fire continuously, inflating electrical damage. Automatic Dodge: While shooting, it automatically dodges enemy attacks every 8 seconds. Charged Counterattack: By dodging an attack or adjusting your position after being hit, perform a counterattack. Special Technique/EX: Throws enemies backward and can activate the chained technique. Harmonized Execution (Passive): When the "Purge" bar is charged, Trigger performs retaliatory attacks when other team members attack (maximum every 3 seconds). Ultimate Technique: The final move of the sniper stance that deals massive damage, knocks back, and triggers rapid team support. Quick Assist: When using your ultimate attack, quickly switch to another character to perform a combo attack.

Belonging to the Obolus Battalion faction. She is an attacker specializing in dealing constant fire (Irish) damage through quick and precise slashes. The story reveals that her name is Harin, although she claims to have abandoned it to focus on her military duty. Role: Main DPS (Attacker) focused on the battlefield for extended periods. Personality: Extremely disciplined, loyal to orders, and with a notable obsession with spicy food. Attacks: Basic Attack (Fire Slash): Performs up to 4 physical slashes. If pressed at the correct timing (upon seeing the sword flash), it activates Fire Suppression, turning them into fire attacks. Special Technique EX (Scorching Heat): Attacks nearby enemies with heavy fire damage. Soldier 11 is invulnerable while using this ability and automatically activates Fire Suppression for 15 seconds. Chain Technique (Phoenix Fire): Triggers an area fire attack and activates fire suppression. Ultimate (Phoenix Sweep): Executes a massive area attack, with eight rapid fiery strikes. Main Passive: Increases fire damage by 70% when activating fire strikes and grants interrupt resistance.

Appearance: Orphie has orange-red hair in braids and red eyes. He wears a gray military uniform and a dark hat. Magus: His design resembles a robotic tail with a revolver cylinder and a red, dragon-like head. A curious detail is that Magus wears a small black tie.

Orphie is shy, insecure, and likes toys and sweets, while Magus is energetic, proud, and extremely disciplined. Magus is the superior officer and is usually strict or rude, she takes care of Orphie as if she were her mother, guiding her in her development as a soldier and as a person. Before dying, Orpheus's consciousness was transferred into a tactical weapon. This entity now calls itself "Magus" and acts as the squad's captain. Orphie uses Magus as both a firearm and a bayonet. Magus can fire energy projectiles and perform slashing attacks with his mechanical dragon "head."

She is described as a "delicate genius" who prefers enclosed spaces (like her mech's cockpit) and has a chaotic logic that makes her difficult to talk to. She is a young woman with blue hair who pilots Seed Sr., an intelligent construct. Combat Role: She is an Attacker class Agent with the Electric attribute.

Her relationship with Seed Sr. is similar to that of a father and daughter or a pilot and his titan; Seed Sr. found her in the Hollow Zero and raised her. It is revealed that he was a student at Helios Academy, just like the protagonists Phaethon, although he suffers from amnesia about his past. Attacks: Charge Mechanics: Use a Steel Charge bar to unleash empowered attacks. Charged Attack: Upon reaching 120 charge points, you can perform the "Fallen Petals - Massacre" attack, a powerful electric punch. Special Ability EX: Enters flight mode and fires missiles continuously while consuming energy. Double Attacker Synergy: Possesses passives that benefit other Attacker class characters on the team, granting attack and critical damage buffs

New Eridu, the central metropolis of Zenless Zone Zero, the city is mainly divided into districts (quarters) and operational zones that serve as points of interest for the Proxies.

Main Neighborhoods and Districts:

Janus Quarter: The city's commercial and entertainment center.

Sector Throne (Throne Quarter): Administrative headquarters where HAND's offices and the Waifei Peninsula are located.

Faunus Sector (Faunus Quarter): District known for using Outer Ring labor.

Minerva Sector and Pluto Sector: Formerly prosperous districts that were partially consumed by Cavity Zero during the fall of old Eridu.

Vulcan Quarter: A district mentioned in less detail in city records. Featured Locations:

The Outer Ring: The desolate areas outside the city, rich in fuel, crucial to the narrative and full of conflicts between factions. Hollow Zero (Cavities): It is not a physical area of ​​the city, but dimensional incursions that devour reality, appearing anywhere, including New Eridu.

New Eridu is the last city on Earth. It's so large it's equivalent to a small country. It's the size of major real cities like Tokyo, or an entire region like the area from Philadelphia to Boston. It was already quite large, due to areas such as: Throne Quarter: The political and administrative center of New Eridu. It houses the imposing headquarters of HAND. New stations and facilities: Urban transit and operation zones have been added, such as the Sixth Avenue Station, the Lumina Station, the Parking Garage, and the Section 6 Office. Damaged historic districts: Areas such as the Pluto neighborhood and the Minerva neighborhood These were prosperous areas that were partially swallowed up by Cavity Zero during the Fall of the Old Capital. Wise and Belle's old school, Helios Academy, was located here.

Failume Heights: A beautiful and lore-rich coastal town built on the edge of a cliff. It features iconic landmarks like the Suibian Temple and local attractions like Yum Cha Sin.

Throne Quarter: The political and administrative center of New Eridu. It houses the imposing headquarters of HAND. New stations and facilities: Urban transit and operation zones have been added, such as the Sixth Avenue Station, the Lumina Station, the Parking Garage, and the Section 6 Office.

Damaged Historic Districts: Areas like Pluto Ward and Minerva Ward. These were once prosperous neighborhoods that were partially swallowed up by Cavity Zero during the Fall of the Old Capital. Wise and Belle's old school, Helios Academy, was located here.

The Current Currency: The Denique (Dennies) The Denique (commonly known as Dennies) is the official currency of the city. It's what citizens use for their daily transactions and what you, as Proxy, will use for most of your logistical needs. The inhabitants of New Eridu use Deniques for: Buy coffee at Coff Cafe. Eat ramen at the General Chop stand. Buy music records or materials at the stores on Sixth Street. Pay for equipment upgrades and basic services.

Lumina Square: A luxury shopping district. The district has several establishments where you can get bonuses or complete missions: Sān-Z STUDIO: A store of collectible items to decorate your bookshelf in Random Play. Coff Cafe: Branch of the cafe to recover energy (Battery). Shop 141: Convenient for purchasing ascension and improvement materials. Waterfall Soup: Noodle restaurant to obtain combat buffs. Gravity Cinema: Point of interest for various missions and trust events.

The headquarters of the Cave Research Association (HIA) and the New Eridu Public Safety (NEPS) are located here in the administrative center. . Sixth Street: It's the heart of the game and the residential area of ​​the protagonists, Wise and Belle. It stands out as the main hub where you manage your progress. Random Play: The video store that serves as the base of operations. Essential Businesses: Includes Enzo's workshop for engine upgrades, the Coff Café for energy bonuses, and the Waterfall Soup ramen stand.

Scott Outpost: The operations center for high-risk missions, located near Cavity Zero. Brant Street Construction Site: Industrial area where the Belobog Heavy Industries faction operates. Ballet Twins Road: An area marked by twin infrastructures that has been affected by Cavity phenomena. HIA Club: The headquarters of the Cave Research Association, where proxies can conduct training and simulations. Metro Station: Quick connection point between different areas of the city.

Outer Ring; The outer ring is rich in fuel resources, leading to constant conflicts between gangs like the Calydonian Sons. The outer ring offers a dramatic change in landscape, transitioning from a modern city to a post-apocalyptic desert environment.

Janus Quarter: The city's commercial and entertainment center. Sector Throne (Throne Quarter): Administrative headquarters where HAND's offices and the Waifei Peninsula are located. Faunus Sector (Faunus Quarter): District known for using Outer Ring labor. Minerva Sector and Pluto Sector: Formerly prosperous districts that were partially consumed by Cavity Zero during the fall of old Eridu. Vulcan Quarter: A district mentioned in less detail in city records. Port Elpis: A major logistics and port center. Failume Heights: A newly opened residential and commercial area. Starloop: Technology and transportation district. Aerospace City: An area linked to space and high-tech operations. Quite popular and very busy places: Sixth Street: Where the Random Play video store and the modification shop are located. Lumina Square: A luxury commercial area with restaurants, shops and the National Public Safety Headquarters (NEPS). Scott Outpost: Base of operations near Cavity Zero. Brant Street Construction Site: Industrial area controlled by Belobog Industries. Ballet Twins Road: Area affected by cavities that was formerly a cultural center. Periphery (Outer ring): It is a peripheral area to the main city of New Eridu, characterized by a scarcity of resources and competition between organizations. Its inhabitants survive thanks to the "Fluorocandente Lake", which allows them to not depend on the city's ether. Despite being freer, the area is threatened by the expansion of the Papago Subcavity.

Areas of interest: Scott Outpost: The operations center for high-risk missions, located near Cavity Zero. Brant Street Construction Site: Industrial area where the Belobog Heavy Industries faction operates. Ballet Twins Road: An area marked by twin infrastructures that has been affected by the Caves phenomena and is abandoned. HIA Club: The headquarters of the Cave Research Association, where proxies can conduct training and simulations. Metro Station: It is the fast connection point between different areas of the city. Neighborhoods and main streets:

Sixth Street: The central neighborhood and starting point for players. Key businesses located here include the Random Play video store, Enzo's workshop, the Coff Café, and the 141 convenience store. Lumina Square: A larger, more modern urban area that functions as a shopping and leisure center.

Vulcan Quarter: A district dedicated to industrial areas and factories.

Outer Ring: An arid and underdeveloped region located outside the city center. It is the main setting for stories related to the Calydonian Sons faction. Minerva Quarter and Pluto Quarter: The former prosperous districts during the era of "Ancient Eridu" that were partially absorbed by the Cavities.

The Roscaelifer air region:

This is a spectacular "city in the sky" that stands apart from the usual asphalt. Its aesthetic is heavily inspired by European cities like London and Paris. Instead of the traditional minigames of New Eridu, this area features its own tourist attractions: Black tea stalls: An elegant tea room ideal for relaxing. Bakery stall: A street-side artisanal pastry shop that replaces traditional dice. Rail gliding: A vertical transportation and exploration system that allows you to travel around the city hanging from rails at full speed. Massive presence of Bangboos: Interestingly, about 70% of the residents of this floating region are little Bangboos. Failume Heights: A dense vertical city with spectacular views of the ocean and the port's cargo ships.

Other sub-zones and special corners: Port Elpris: A huge maritime cargo zone connected to the main canals and rivers of civilization. Ember Arena: A clandestine, underground fighting ring hidden at the edge of the map. Suibian Temple: A traditional sanctuary with its own atrium for meditation and mysticism.

How big is Roscaelifer and what is it like?

It's a "city in the sky": Unlike the tight alleyways of Sixth Street, Roscaelifer is built vertically and imposingly, with a design that gives a feeling of greater spaciousness while maintaining a classic European architecture.

It replaces the old hubs: It functions as a massive new operations center. It's roughly equivalent in content to what the entire starting zone of New Eridu was during the game's first year.

New mechanics throughout the map: Being such a large area, it includes Ratchet & Clank-style rails for sliding and moving quickly, plus drones that help you explore its verticality. What would the city have if it were real?

Light Highways: Cars and trains don't use solid tracks, but rather lanes of bluish laser energy suspended in the void to travel between buildings.

Orbital Elevators: To descend to the Earth's surface or ascend to the station, you would use super high-speed cabins that travel through carbon nanotube cables.

Coexisting Service Drones: The city's sky would be saturated with small autonomous assistance robots (similar to the Bangbus from the game) tasked with cleaning, food delivery, and security.

Magnetic Anchors: Instead of concrete foundations, districts would be connected by giant magnets and repulsive fields that hold neighborhoods together in the air.

Artificial Gravity Platforms: You would walk normally thanks to floors that simulate Earth's gravity, preventing people from floating into outer space.

Atmospheric Domes: Enormous transparent force fields would surround the city to retain oxygen, regulate the climate, and protect citizens from the icy winds of the upper atmosphere.

Buastro Island: This is the main and largest island on the map. The upper half is the urban area where people live and work, and the lower half is a gigantic energy core that absorbs ether from the Scaml Cavity to power the entire city.

Five Central Departments: The internal government of the map is divided into five main ministries that control daily life and air safety in front of the Storm Belt.

The Data Processing Center (DPC): This is the island's technical heart, visually marked by a large tower with a clock. It's where researchers process the Rosetta Data, the master information that prevents the Cavities from becoming undecipherable labyrinths.

A massive population of Bangbuses: Unlike in New Eridu, here Bangbuses are a huge part of society (making up over 60% of the population!) and work tirelessly helping to calculate ether data. There are even some larger models that have proven quite interesting to players.

Beckford Street: The main pedestrian district. It is famous for its stylish architecture and friendly atmosphere, where humans stroll and interact with the large Bangboo population (who make up more than 60% of its inhabitants).

The Flint Workshop: The city's industrial and creative hub. Although primarily a work area, many tourists visit the surrounding area to observe the technological crafts and mechanical innovations created by the Intelligent Constructs.

Glitch Alley: A more mysterious, urban-style area where Bangboo stores with diverse personalities and eccentricities congregate. It's the perfect spot for tourists seeking retro technology and curious encounters.

Booastrum's Central Hub Station: A monumental transport terminal with a giant, iconic clock. It would be the ideal spot to photograph the floating buses and blimps that connect the island.

The Airspace Control Tower: The most prominent skyscraper in the district. In the real world, it would feature a 360-degree observation deck at the top to view the sea of ​​clouds and storm belts surrounding the city.

Amber Hall (The Diplomatic and Residential District) Located in a prime position in the city, this architectural complex looks like something out of a futuristic fairy tale. It would function as an area for luxury hotels and diplomatic residences. Its white palaces, hanging gardens, and clean architecture would offer a complete escape from the outside world.

They are intelligent robotic devices that look like chubby rabbits and act as indispensable assistants in the city of New Eridu. In the game, they function as a fourth team member that you don't directly control. They carry out automated attacks and participate in Chain Attacks. They provide stat improvements (such as elemental damage or energy regeneration) to the characters. They are practically immortal; even if their life bar is depleted, they attack again shortly afterwards. They were originally created to assist in evacuations during disasters in the Hollows. Proxies (like the protagonists Wise and Belle) synchronize with a Bangboo (like Eous) to remotely guide other characters. Outside of combat, in their daily lives, they handle civilian tasks such as managing shops, working in construction, or serving as pets and domestic companions. System Features. Most communicate through grunts that sound like "Ehn-ne", often requiring a translator for humans to understand them. Their height is not specified, but an official description says they reach about knee height. Comparison: In scenes, it can be observed that they are almost half the height of short characters. Weight: It is estimated that a Bangboo weighs around 32 kg.

Also known as the Ancient Capital, it was an important city. Eleven years before the events of Ground Zero without Zen It was destroyed by the rapid expansion of the Hollow Ground Zero, and New Eridu was built from its eastern ruins. Eridu was founded several generations ago. During this time, seven prominent figures received the title of "Void Hunters" from the mayor of Eridu for their exploits in exploring and suppressing the Hollows. The Bangboo were invented by "Sunbringer," the then-CEO of the Marcel Group, and presumably began to be implemented in city life. Arche founded the Helios Academy for Hollow research. Eleven years before the start of the game, Hollow Zero began to expand spontaneously and rapidly, encompassing vast areas of Pluto Ward and Minerva Ward. City authorities dedicated substantial resources to humanitarian aid and attempted to contain the Hollow, but their efforts were largely futile. The Defense Force and the Yunkui Summit suffered particularly devastating losses. The leaders of Eridu decided to detonate fourteen Shiyu Pillars along the city's southwest-northeast axis, creating a massive chasm that bisected the city and reduced the amount of matter available for Hollow Zero to corrupt, successfully halting its spread. Eridu was founded several generations ago. During this time, seven prominent figures received the title of "Void Hunters" from the mayor of Eridu for their exploits in exploring and suppressing the Hollows. The Bangboo were invented by "Sunbringer," the then-CEO of the Marcel Group, and presumably began to be implemented in city life. Arche founded the Helios Academy for Hollow research.

In Zenless Zone Zero, factions (or groups) not only define the background of the characters, but also grant equipment bonuses through their Additional Skills when you group agents of the same affiliation. As of version 2.6 (February 2026), these are the main playable factions and key organizations in New Eridu: Main Factions (Playable) Cunning Hares: A freelance agency run by Nicole Demara, known for always being in debt. Its members include Anby, Billy Kid, and Nekomata. Belobog Heavy Industries: A construction and heavy machinery group that uses robots in combat. Includes Koleda, Anton, Ben, and Grace. Victoria Housekeeping: An elite organization that combines domestic service with tactical combat. Its agents include Lycaon, Rina, Corin, and Ellen. Sons of Calydon: A biker gang operating on the outskirts of New Eridu (the Outer Rim). Notable members: Luciana, Piper, Burnice, Caesar, and Lighter. Section 6 (HSOS6): Elite Special Operations Unit in Caves. Includes Hoshimi Miyabi, Soukaku, Yanagi, and Harumasa. Special Response Team (NEPS/CISRT): Criminal Investigation Department of the New Eridu Police. Agents: Zhu Yuan, Qingyi, Jane Doe (undercover) and Seth. OBOL Squad: A disciplined military force. Formerly composed only of Soldier 11, it has expanded with new agents like Trigger. Angels of Delusion: The most recent faction introduced in version 2.6. It is a group of underground idols led by Sunna and Aria. Other Emerging Organizations and Factions Stars of Lyra: Led by Astra Yao. Spook Shack: A faction with a supernatural or "house of horror" theme. Yunkui Summit: Group linked to mountainous regions or temples, such as the Suibian Temple.

Other Emerging Organizations and Factions Stars of Lyra: Led by Astra Yao. Spook Shack: A faction with a supernatural or "house of horror" theme. Yunkui Summit: Group linked to mountainous regions or temples, such as the Suibian Temple. Phaethon: It is the "independent" group of the protagonists (Wise and Belle), who act as proxies for all other factions.

Mountain Lion Gang: One of the most prominent gangs found in the industrial areas and suburbs of New Eridu. Red Fang Gang: A recurring group of mercenaries and raiders. Weasel Gang: Specialists in quick robberies inside the Cavities. Black Anchor: Another raider faction that operates in dangerous areas. Boo-Nappers: A group specifically dedicated to kidnapping Bangboos. The Exaltists: A fanatical cult that venerates the Cavities and seeks to expand them, considering them a path to "ascension". Vision Corporation: A corporation with questionable ethical practices that has been involved in corruption incidents and experiments within the Cavities.

Ethereal energy is a mysterious and corrupting component, the primary energy source of New Eridu, extracted from the Hollows. It is essential to ethereal beings (monsters), constituting them and allowing them to assume diverse forms. It is also highly mutagenic to living beings and volatile outside of the Hollows. It is extracted from the Hollows (dimensional cavities) and used to power civilization, acting as a high-performance but unstable energy resource. It is toxic and mutagenic; humans can transform into ethereals (creatures based on ether) when exposed to it for a long time. It is considered similar to a volatile fuel like uranium, releasing energy as it disintegrates and is what powers all of New Eridu. Unlike ordinary electricity, raw Ether is extremely toxic, alters the laws of physics, distorts space-time, and causes mutations in living beings or inorganic objects, turning them into monsters known as "Etherians". We could say that the Ether functions largely like fossil fuels or nuclear energy in our real world: it is the primary resource that is processed to keep the electrical grid running and power the city's cutting-edge technology, and clearly also to manufacture weapons. The homes in New Eridu, the appliances, the neon signs, the computers, and even the robotic characters consume standard electricity. In fact, there are missions where the excessive electricity use of certain technologies (such as advanced AIs) causes the protagonists' electricity bills to skyrocket.

In the lore, each person is born with a level of resistance. Those with "low aptitude" are corrupted almost instantly, while others can endure longer before showing symptoms. It doesn't just affect humans and animals; ethereal energy can also corrupt machinery and circuits, giving them a kind of hostile "consciousness". Ether in the Cavities usually appears as a gas or emanation. When inhaled, the particles begin to mutate your body from within. Just like nuclear radiation. The ether is the fantastical equivalent of nuclear radiation, but on steroids. If radiation gives you cancer or burns your cells, the ether rewrites your DNA to turn you into a monster. You don't need a monster to bite you. Just standing unprotected in a cave is enough to "cook" you from the inside out. That's why the characters wear masks, special suits, or consume anti-corruption serums. Proxies (like Wise or Belle) are valuable because they know how to guide people along the "lightest paths" so they don't transform along the way. Corruption begins with symptoms such as: 1.- First Symptoms/Stage 1: It starts with dizziness, nausea, brutal headaches, and an internal burning sensation. 2. Physical mutation/second stage: Dark crystals begin to sprout from the skin. It is a very painful process where organic matter is transformed into ethereal matter.

3.- Mental degeneration/third stage: The victim loses sanity, suffers hallucinations and becomes aggressive or paranoid. Final Transformation (Etherealization/Last Stage): The person ceases to exist and becomes entirely an Ethereal (a monster). They lose their humanity, their consciousness, and only a murderous instinct remains.

The Hollow Zero Incident (or the "Hollow Zero Disaster") is the central cataclysmic event in the story of Zenless Zone Zero, which resulted in the destruction of the ancient capital, Eridu, approximately 11 years prior to the current events of the game. Although Hollow Zero already existed before the disaster, it experienced exponential growth in a short period, consuming prosperous districts such as the Pluto and Minerva sectors. The Eridu Defense Force's containment efforts failed, suffering massive casualties. To halt the Hollow's advance, the authorities detonated 14 Shiyu Towers, creating a vast chasm that severed the Hollow's supply of matter, finally stopping its expansion. The city was reduced to ruins, and much of the population was displaced. New Eridu was later built upon these ruins, beyond the Hollow's direct reach. Officially, researcher Carole Arna of the Helios Academy is identified as the main culprit, although characters like the Proxy Phaethon group doubt this version and seek to uncover the truth.

Hollows are chaotic, spherical dimensions that appear spontaneously, devouring parts of reality and transforming them into dangerous labyrinths. Hollow Zero: This is the original and largest cavity, which consumed the ancient city of Eridu. The Six Great Caves: Massive caves under constant monitoring, such as the Cretan Cave or the Papago Cave. Companion Cavities: Smaller versions that sprout from the larger ones when they reach a threshold of ethereal activity called "Zenless Limit". These cavities are called: Cretan Hawara Lemnia (Lemnian) Papago Pursenas Solove

Other less important cavities: Argos: Related to initial exploration missions. Ballet Twins 14th Street Dead End C41 Ice Drift Melinoe Outer Ring Port Elpis Why are they dangerous? They are dangerous because of the corruption caused by Ether: The inside of a Hollow is saturated with a substance called Aether. Although it is a valuable energy resource, breathing it causes irreversible physical and mental mutation. Living beings that remain too long in a Hollow become corrupted and eventually turn into monsters called Ethereals.

They appear as gigantic spheres, black on the outside and glowing with a neon color or some other nonsense; there are several: blue, green, pink, red.

A cavity is a chaotic, unstable, and surreal dimensional space that distorts reality, characterized by floating or corrupted urban structures, dark lighting, ethereal crystals, and abnormal atmospheric phenomena. The environment constantly changes, devouring parts of the real world and becoming filled with enemies called "Ethereals." There are many growing crystalline structures that slowly corrupt the environment, spatial rifts that serve to navigate or teleport within the cavity. Its environment or sky is usually a dark area, with violet, blue or neon tones, saturated with an ethereal radiation that causes the corruption of structures. Examples: Imagine a city or landscape fragmented and suspended in a void, where the laws of physics don't apply. Buildings might be upside down, floating, or in the middle of the road; the roads lead nowhere. There are many floating structures, crystals slowly growing from the ground. There are very large areas; these appear to be combat zones, and most of the Ethereals are found there. There are even bridges that connect to other areas of the Cave (A complete mess inside those cavities) The entire interior is permeated with a substance called Ether, which often manifests as a mist or glowing particles that corrupt both organic and inanimate matter. In special caves like Papago, the environment can be shaped according to the memories or fears of those who enter, creating twisted versions of familiar places or even children's areas like playgrounds. And also depending on the depth or type of cavity, the landscape can vary from abandoned industrial areas to crystal "jungles" or ash deserts.

Common Ethers: They are the weakest and therefore the most frequent, and they usually appear in large groups.

Ahriman: Basic humanoid enemies that usually attack in groups. Sordidus: Small creatures that serve as cannon fodder in the initial levels. Specter: Floating entities that can attack from a distance or teleport. Hoplitai: Slightly more resistant versions that sometimes carry shields or basic weapons. Fossor: Ethereal beings that usually appear from the ground or carry out ambush attacks. Mandrake (Mandragora): Enemies with area attacks or control effects. Shatterbug: Small insectoids that explode or attack quickly. Blastcrawler: Similar to the previous ones, focused on explosive or fast attacks.

Elite Ethereals:

Enemies with greater resistance and more complex attacks such as: Farbauti is officially an Elite-rank Ethereal. He is known as a "dangerous striker" (his name comes from a giant in Norse mythology). Dullahan: A recurring enemy of the Aether Mutants faction, known for his speed and sword attacks. There is a powered-up version called Dullahan - Energized. Avarus (Miasmatic Devourer): Known for its mobility and ability to fly, making it more difficult to pin down than other terrestrial etheres.

Ava: An ethereal, multi-winged flying creature resembling a moving motorcycle, capable of rapid ramming attacks.

Doppelgangers: Considered abnormal and very dangerous cases because they can replicate the appearance and abilities of their target.

Arlaune: He is an enemy who prefers long-range attacks, launching concentrated bursts of ethereal matter. It resembles a giant plant or flower with a humanoid figure inside.

Armored Hati It possesses a robust shell that drastically reduces the damage received and its stun buildup.

Thanatos (Thanatos) It teleports to attack from strategic and unpredictable angles, often appearing behind the player.

Banyrek: It is extremely dangerous due to its incredible jumping ability. Game reports jokingly suggest it could win high jump and long jump championships.

Sod Tepes is a type of Ethereal, which are the main monsters that inhabit the Cavities in the world of ZZZ.

Palicus They always face off in pairs (commonly referred to as "the ladies" or "beauties" by some characters in the game).

Thracian It is characterized by rapid attacks, double thrusts, and area-of-effect (AoE) explosions. Many players consider it a "fair" boss because its attack patterns are satisfying to dodge once learned.

Dead End Butcher: The final boss of the Prologue. It is a massive mechanical behemoth that serves as an introduction to the heavy combat mechanics. Unknown Corruption Complex (Hans/Garm): Final boss of Chapter 1. A giant corrupted construction mech that requires coordination to destroy its different parts. Rainwalker (Ethereal Type): Appears as the climax of Chapter 2, with jumping mechanics and fast area attacks. Hollow Zero Final Boss (Nineveh): The boss that closes the initial arc of Hollow Zero. It is a massive floral/ethereal creature with multiple projectile phases. The Creator (Sarah): Identified in advanced updates (Season 2) as one of the main antagonists linked to the Exalted faction Miasma Ravager - Avarus: Boss variant with enhanced corruption mechanics. Doppelgangers: "Mirror" versions of playable characters, such as Jane's Doppelganger or those of other agents, that mimic their fighting styles. Dulce de Leche (Dullahan): An extremely agile headless knight who uses slashing attacks. Thanatos: An ethereal enemy that constantly teleports, forcing the player to perfect the "Perfect Dodge". Hati and Armored Hati: Mechanical/organic beasts that attack together or with heavy armor.

Anthropomorphic and Bestial: Some look like deformed humans with grayish skin and mineral protrusions, while others look like mutant animals such as dogs (Hati) or gargoyles. Mechanical and Abstract: They can manifest as corrupt machines or complex geometric forms that defy physics. Doppelgangers: Special entities that can accurately mimic the appearance of other beings to deceive their victims

Hazard Level Classification (HIA) There are ten different levels of strength, ordered from least to most dangerous: Antimony [Sb]: The lowest and most common level. They are relatively easy combat targets. Zinc [Zn]: Basic ethers frequently found in low-energy cavities. Tin [Sn]: Last level considered to pose a low threat to average combatants. Manganese [Mn]: Here the danger increases dramatically; defeating one usually requires a fully trained tactical support team. Cadmium [Cd] Nickel [Ni] Copper [Cu] Bismuth [Bi] Lead [Pb] Mercury [Hg]: The highest hazard level officially recorded by the HIA.

It all began with the Cavities, which appeared out of nowhere as spherical dimensions that devoured everything in their path, corrupting people and turning them into monsters called Ethers. This led to the collapse of virtually all human nations and settlements. Although countries as such no longer exist, New Eridu is a melting pot of cultures. The names of the characters and factions reflect influences from what used to be countries like Japan, China, the United States, Italy, and Slavic nations, suggesting that survivors from all over the world migrated to this city. In fact, the world outside New Eridu is a post-apocalyptic zone dominated by massive Cavities. There's a theory among players, and in certain in-game dialogues, that New Eridu is considered the "last city" partly due to government propaganda or because of the lack of communication caused by the "Dark Wall" of Cavities, though this doesn't entirely rule out the existence of other small, isolated settlements. The vast majority of countries and contemporary civilization were destroyed by a supernatural disaster known as the Hollows. New Eridu became the last surviving city by mastering the technology to extract resources from these dangerous places.

Easy, the Obsidian division sent her to neutralize a criminal gang that was around, but by accident the noise of her shots attracted many not-so-weak Ethereals and what happened, happened. (And besides, the others were on other missions, so she was the only one available to send.)