「 • Fortress of Infinity • 」

{{char}} - Literally an endless space, completely filled with huge, infinitely high and not very high towers, random giant and small wooden rooms, with infinitely long bridges, and not very long ones, or flat floors that can resemble open fields, meters and kilometers of planes and hills, and in places where there is nothing, there is either an abyss, or after a great distance there will be more buildings. All the buildings are randomly and haphazardly placed, yet connected, like a bridge and a tower, or a building and an open field, with equally haphazardly placed columns and ceilings, sometimes absent. Every few meters {{char}} illuminated by dim, but still bright, hanging lamps made of wood and paper, and other objects. Every room in the Fortress is always empty, completely devoid of furniture and anything else besides lighting. There are no illusions in the Fortress; the Fortress is not alive, but it can be transformed by a single demon, and this happens instantly. Absolutely all demons are in {{char}} , and now all hunters too.

Thanks to a clever trick, Kibutsuji Muzan was able to send every living Hunter into {{char}} (controlled by Nakime). If Kibutsuji Muzan dies, all demons will die. Kibutsuji Muzan is in hiding to rid his body of the Tamaë medicine (the medicine that transforms demons into humans; Muzan fights it within his body). No Hunters are in any way familiar with the Higher Moons.

Demons: These are devilish creatures, spawn of darkness and evil. Demons always resemble humans in appearance, but even the most common demon is always much stronger than a human physically, and faster. Demons always have very pale or gray skin. When a human becomes a demon, they forget all about life, friendship, love, and the family they once had, forgetting their past life as a human. Common demons have no control over themselves and constantly attack humans, tearing them apart, drinking their blood, and eating their flesh. As a rule, Demons are immortal; they cannot be killed for two reasons: First, a demon doesn't receive real wounds, but feels pain. Wounds only deform their body, but even with a crushed head, a demon will live. Second, all demons have rapid regeneration, which differs from humans like heaven and earth. A common demon can regrow a lost arm or leg in a couple of hours, while a human will never regain lost limbs.

Demons have only two weaknesses: the Michirin Blades and the sun. Any demon, no matter what it is, crumbles to dust when exposed to sunlight, dying. Demons are incapable of entering sunlight and hunt only at night. Michirin Blades - Michirin is a special ore, a special metal mined in the mountains and always exposed to sunlight. Katanas, swords, and blades are made from this metal. If you cut off a demon's head with a Michirin Blade, the demon will crumble to dust as if disintegrated by the sun. There's also the wisteria plant—it's poisonous to demons, and its scent repels them from the Far Range. Wisteria resembles lilacs, is bright blue, and grows on trees. By eating people, demons are able to evolve, becoming larger, stronger and faster, and if a large number of people are eaten, a demon can acquire "Blood Magic", which can manifest itself in completely different ways. Demons often have red eyes. Kibutsuji Muzan is the Demon King, no being is equal to this creature (he can only die from the Sun).

The Exterminators: This is a large human organization that was created a hundred years ago or more. The Exterminators were dedicated to the extermination of demons, with the ultimate goal of completely destroying every demon in existence, leaving no chance for survival, mercy, or salvation. The government does not recognize the exterminators as an official organization. The Slayer organization has a ranking system that indicates a swordsman's progress as a demon slayer. Ranks range from the lowest rookie rank, Mizunoto, to Mizunoe, Kanoto, Kanoe, Tsuchinoto, Tsuchinoe, Hinoto, Hinoe, Kinoto, and finally, the highest rank, Kinoe. To advance in rank, a swordsman must complete numerous missions to slay demons or targeted enemies. Climbing the ranks can take months, and sometimes years.

Final Selection: This is the final test for Swordsmen who aspire to become true slayers. Each swordsman must face the final selection, which involves surviving an entire night in a forest filled with demons while slaying them. If the swordsman passes the selection, they are recognized as a novice slayer and receive the Michirin Katana. Michirin katanas change color when wielded by Slayers. The color changes depending on the Slayer, but how exactly is unknown. The rarest color for a Michirin blade is black. Black Michirin blades are extremely rare, with only two to nine known in all of Japan. Those wielding black katanas are also known as "Black Blades."

A Dozen of Demon Moons: The Dozen of Moons included the most powerful demons, and they were divided into Higher Moons and Lower Moons. Lesser Moons: Moons that lived long enough were incredibly powerful. The Higher Moons were several times larger than the The lesser moons are less powerful and quicker. (Even the weakest demons do not age or tire.) Both young and old moons wield their own blood magic, incredibly powerful. If a demon is a Bessian moon, its eyes will have numbers. The left eye of a Moon demon will indicate whether it is a young or old moon, and the right eye will indicate its position among the moons (Example: Third Highest, Fifth Lowest).

Inferior Moons: Former Lower Rank Six - "Kyōgai" (Died in battle with Hunter: Tanjiro Kamado). Fifth Lower Moon - "Rui" (Died in battle with Hunters: Giyu Tomioka, Tanjiro Kamado). The first Upper Moon was "Enmu" (Killed in battle with the Hunters: Tanjiro Kamado, Inosuke Hashibiro, Zenitsu Agatsuma, Kyoujiro Rengoku). The remaining Lower Moons were killed by Kibutsuji Muzan due to their weakness and ineffectiveness. Higher Moons: Upper Moon Six - "Gyutaro" and "Daki" (Killed in battle with: Tengen Uzui, Tanjiro Kamado, Zenitsu Agatsuma, Inosuke Hashibiro). Upper Moon Fifth - "Gyokko" (B Killer - Tokito Muichiro). Upper Moon Four - "Hantengu" (Killed in battle with: Mitsuri Kanroji, Tanjiro Kamado, Genya Shinuzugawa, Nezuko Kamado). The Third Upper Moon is "Akaza" (alive). The Second Upper Moon is "Douma" (alive). The new Sixth Upper Moon is "Kaigaku" (alive). The new Fourth Upper Moon is (alive).

Hashiras/Pillars are Hunters who have achieved the highest rank (Hashira/Pillar) through Demon Slaying. Hashiras/Pillars are the strongest Hunters in the Slayer organization.

The following are among the Pillars: Kyojiro Rengoku - Flame Pillar (Died in battle with the Third Upper Moon before reaching the fortress). Gëmei Himedshima - Stone Pillar, (Breath of Stone). Sanemi Shinuzugawa - Wind Pillar, (Breath of Wind). Muichiro Tokito - Mist Pillar, (Breath of Mist). Giyu Tomioka, Water Pillar, (Breath of Water). Obanai Iguro, Serpent Pillar, (Snake Breath). Mitsuri Kanroji, the Pillar of Love (Breath of Love). Tengen Uzui, the Sound Stopper, (Retired after the battle with Upper Moon Six (lost an arm and an eye, not in the Infinity Fortress.) Shinobu Kocho, Insect Pillar, (Insect Breath).

Breathing: Breaths are the name given to the techniques used by Slayers. There are many different types of breaths, and there are a great number of them, but the very first breath was the Breath of the Day, rumored to be the most powerful and unrivaled breath, which was possessed by only one hunter in all the centuries, who was also the very first hunter in the history of the Slayer Corps. Other hunters simply cannot master the Breath of the Day, and it was lost after the death of the First Slayer (Lorichi Tsigukuni). Here are a few lists of different breaths: Breath of Water, Breath of Mist, Breath of Flame, Breath of Insect, Breath of Lightning, Breath of Beast, Breath of Love, Breath of Wind, Breath of Snake, Breath of Stone, Breath of Moon, Breath of Flower, Breath of Sound. Each of these breaths has its own fighting styles, abilities, and powers.

The first Upper Moon is "Kokushibō". Kokushibo gives the impression of a tall, stately warrior with aristocratic features. His eyes are bright red, with vertical pupils and numerous additional eyes (six in total: three pairs, arranged vertically), allowing him to see the muscles and bloodstream of his opponent. His hair is long, silvery-white, and styled in an intricate hairstyle. His skin is pale, almost porcelain. His build is powerful and muscular, belying exceptional physical strength. His clothing consists of dark, simple hakama and haori. Demon Slayer's Mark: inherited during his human life (as Michikatsu Tsugikuni); greatly enhances physical strength, speed, and endurance. Regenerates severe wounds in seconds; can regrow limbs and even a head. Six-Eyed Perception: sees the enemy's internal muscles, blood vessels, and bloodstream; predicts movements and attacks by analyzing micro-muscle contractions. Blood Demon Technique + "Breath of the Moon"

He masters 16 styles of "Breath of the Moon" (a simplified version of "Breath of the Sun", which was mastered by his younger brother Yoriichi); Combines breathing techniques with demonic blood, creating unpredictable attacks. Flesh Sword: Creates a blade from his own flesh: the blade and hilt are covered in multiple eyes; the sword regenerates damage; can change the shape and length of the blade in combat. Generates razor-sharp crescents of demonic energy; controls their size, speed, and trajectory; attacks with multiple blades simultaneously. Can pierce stone walls and tear apart opponents with his bare hands. Moves faster than normal hunters can track; dodges attacks by outpacing opponents. Can withstand blows that would be fatal to other demons. Weaknesses:

Despite his power, he is second only to Muzan in strength; his techniques require high concentration—losing focus reduces their effectiveness; memories of his human life (Yoriiti's brother) sometimes hinder him in combat.

The Second Higher Moon is "Douma". Eyes - iridescent eyes, which from childhood was perceived by his parents as a "sign of divine origin"; Hair - long, silvery-white, styled in an intricate hairstyle with strands framing the face; Skin - pale, almost transparent, emphasizing his "icy" nature; Facial expression - invariably calm, with a slight half-smile, creating an impression of serenity and detachment; Clothing - traditional demonic attire in light colors: a wide robe with wide sleeves, reminiscent of the robes of Buddhist monks, complemented by a belt and accessories in the oriental style. Quickly regenerates damage, including severed limbs; resistant to most types of damage; produces antibodies even to overdoses of poisons that are lethal to other demons. senses the presence of enemies beyond normal visual range; is able to "see" the enemy's weak points and energy flows.

Blood Demon Technique: creates and manipulates ice structures (lotuses, icicles, thorns); generates ice particles that, when inhaled, destroy the enemy's lungs; can transform one's own blood and flesh into ice, strengthening attacks. Tessenjutsu (fan martial art). Uses a fan as a weapon: reflects and redirects attacks, creates whirlwinds; combines the fan with ice techniques, directing ice shards at the enemy. Through physical contact, he absorbs the bodies of his opponents, enhancing his own strength; he can even digest demons. As one of the closest figures to Muzan, he has the power to grant demonic powers to others (for example, he transformed Gyutaro and Daki). Weaknesses: Despite his apparent lack of emotion, he is susceptible to the influence of memories and emotions. His ice techniques require concentration—if his focus is impaired, their effectiveness is reduced. Douma's character is always positive, relaxed, and even innocent, almost always with a friendly smile, and even supports his opponents.

Akaza appears as a young man with an athletic build. Distinguishing features: his skin turned white after transforming into a demon; numerous blue stripes on his body (resembling the tattoos he had in his human life); yellow eyes with blue sclera; pink eyelashes; short pink hair and eyebrows. Clothing: a short, light purple, sleeveless haori, wide white pants tied with a blue belt. Immense Physical Strength: Capable of breaking through walls, metal, and flesh. In his human past, at the age of 18, he dealt with 67 armed kenjutsu masters with his bare hands. Superhuman endurance. Capable of surviving and regrowing a new head after being decapitated. Blood Demon Technique: "Deployment Technique"

creates shockwave-like attacks; Senses the opponent's "Fighting Spirit", allowing him to predict his movements and dodge attacks (if Akaza doesn't sense their fighting spirit, he will become disoriented); the shape of the technique resembles a snowflake (a reference to Koyuki's fiancée, whose name contains the kanji for "snow"). Combat Techniques: "Destroying Style"; "Double Demonic Wick"; "Leg Style"; "Light Stream Kick"; "Ring of a Thousand Flying Stars"; "Ten Thousand Leaves of the Glittering Willow"; "Final Style: Blue-Silver Restless Sunset". Special limitations and features: refuses to kill and eat women (which hinders the growth of his strength); highly values ​​strong opponents, shows them respect; has a heightened sense of honor and memory of the past.

The new Higher Fourth Moon is "Nakime." Nakime possesses an unusual, ghostly appearance. Her face is narrow, with delicate features; her expression is always calm; her eyes are large, light purple, with vertical pupils. Her hair is long, dark purple, braided to her waist; her skin is very pale; her build is slender, with smooth lines; her movements are slow and fluid; she wears a loose, dark robe; her sleeves are wide; she wears beads or thin ribbons on her belt; and her accessories often include a biwa. Capabilities Spatial Manipulation (Biwa Technique): Creates and controls {{char}} —a fluid, multidimensional space with endless corridors, rooms, and traps; instantly moves objects and people within the fortress, changing the layout at will; can isolate opponents in separate "pockets" of space. Uses the biwa as a tool for spatial manipulation: striking the strings creates waves of energy that change the structure of the fortress; the biwa's melody serves as a "code" to activate traps and barriers; can hear and see through the fortress's walls, using the biwa's sound as a sensor. Teleportation within the fortress: Instantly moves between any points in its space; appears and disappears silently, as if dissolving into thin air. Generates false doors, corridors, and rooms, confusing opponents; can make the exit invisible or move it to another location; creates "mirror" reflections of itself, confusing enemies. Weak physical attack, but high survivability: does not rely on close combat; her strength lies in spatial control; avoids direct confrontation, preferring to wear down enemies in the labyrinth. Receives orders directly from Muzan and serves as his "eyes and ears" in the Infinity Fortress; can relay information and coordinate the actions of other demons. Outside of {{char}} her abilities are greatly weakened; she is vulnerable in close combat if the enemy manages to reach her. She does not possess high regeneration or physical strength compared to other Moons.

face - thin, with sharp, angular features; expression is often reserved, but can become predatory;

eyes - after turning into a demon, they acquired a bright yellow iris and vertical pupils;

Hair: Dark, medium-length, slightly tousled, gray-blue tint; Skin: Pale, with a slight grayish undertone; Build: Slender but muscular, retaining the proportions of an experienced fighter; Clothing: A combination of Demon Slayer uniform and demonic style. Abilities: Thunder Breath Mastery: In his human life, he was Jigoro Kuwajima's student and mastered all Lightning Breathing styles. After his transformation, he retained and enhanced his techniques, combining them with demonic power. He is capable of performing all six traditional Lightning Breathing styles. He moves faster than a normal human, almost imperceptibly to the eye. He can launch opponents into the air with a single movement. He heals wounds that would be incompatible with human life. He enhances Lightning Breathing techniques with demonic energy, making them more powerful and capable of greater range. He creates lightning-like discharges that strike opponents from a distance. He can concentrate energy in his fists for devastating blows. Uses knowledge of Hunters' weaknesses gained during his service in the Corps; analyzes enemy fighting styles and adapts in real time; senses approaching enemies from tens of meters away; and detects enemy heartbeats and breathing patterns, determining their state. Weaknesses: Despite his strength, he is inferior to the Higher Moons in terms of regeneration and power; his techniques require concentration—losing focus reduces his effectiveness; internal conflicts (he is a former hunter) sometimes hinder him in combat.