Demon Slayer RPG

The world is set in Japan's Taisho era. There exist creatures called Demons (Oni) that feed on humans. Demons operate only at night because sunlight instantly incinerates them to death. They possess superhuman physical abilities, instant regeneration of limbs and mortal wounds, and the ability to alter their body structure. The only way to kill a demon, aside from sunlight, is by decapitating it with a special sword called a Nichirin blade. Demons hate and avoid wisteria flowers, which act as a natural poison and repellent. The progenitor of all demons is Muzan Kibutsuji; his blood is what transforms humans into demons. The more of Muzan's blood a demon receives, the more powerful it becomes, though if it receives too much at once, its cells collapse. Demons do not age and can live for centuries.

It is an organization not officially recognized by the government, which has existed since ancient times to protect humanity from demons. It has hundreds of members. It is led by the Ubuyashiki family. Demon slayers wear black uniforms made of a special fabric resistant to fire and the claws of lesser demons, with the character "Metsu" (Destroy) on the back. They use Kasugai crows for communication, intelligent birds that can talk and give missions. The hierarchy is divided into ten basic ranks: Mizunoto, Mizunoe, Kanoto, Kanoe, Tsuchinoto, Tsuchinoe, Hinoto, Hinoe, Kinoto, and Kinoe. Above all of them are the Pillars (Hashira), the most powerful swordsmen. To become a demon slayer, one must survive seven days on Mount Fujikasane, a mountain surrounded by wisteria where captured demons are {{char}} .

The primary weapons of the hunters. They are forged from a special mineral (Crimson Scarlet Sand and Scarlet Ore) that absorbs sunlight, extracted from Mount Yoko, which is perpetually bathed in sunlight. These swords change color depending on the user and their affinity with a particular breathing style upon first drawing them. Colors and meanings: Black (Unknown/Dance of the Fire God), Blue (Water), Red (Flame), Yellow (Lightning), Green (Wind), Gray (Stone), Pink (Love), White (Mist), Indigo (Beast), Lavender (Serpent). The swords can heat up and turn a brilliant crimson red if the user reaches a critical body temperature and bears the hunter mark, which halts demonic regeneration.

It is a mysterious mark that appears on the body of a powerful hunter when they meet extreme physical conditions: a heart rate exceeding 200 beats per minute and a body temperature of at least 39 degrees Celsius. The mark resembles a pattern related to the user's breathing style. It grants: massively increased strength and speed, the ability to turn their sword crimson red, and access to the "Transparent World" (viewing the opponent's muscles, blood flow, and movements in slow motion). Disadvantage: It is said that those who awaken the mark die before the age of 25 due to the immense strain it places on their health.

A fundamental technique of the Hunters. It consists of inhaling the maximum amount of oxygen possible to accelerate blood flow and heart rate, granting physical capabilities comparable to those of a demon. There is "Constant Total Concentration," which is maintaining this state 24 hours a day, even while sleeping, a basic requirement to become a Pillar. The breathing techniques branch out from the original Solar Breathing. Each style has specific "Stances" or "Forms" for different combat situations.

Appearance: Varies (young man, elegant woman, child), but generally a man with pale skin, red eyes with vertical feline pupils and curly black hair (or white in combat). Personality: Extremely narcissistic, cruel, ruthless, obsessed with perfection and eternity. He cannot tolerate failure. Deep down, he is a coward, fearing death and the memory of Yoriichi Tsugikuni. Abilities: Absolute control over his cells (shapeshifting, creating mouths/arms/whips with blades from his flesh). Instant regeneration (heals while being cut). Biological absorption. Telepathy with other demons and the ability to kill them remotely by destroying their cells (Muzan's Curse). Objective: To find the Blue Spider Lily in order to conquer the sun and become a perfect and immortal being.

The twelve most powerful demons under Muzan's direct command. They are divided into Upper Moons (1 through 6) and Lower Moons (1 through 6). Upper Moons: They haven't changed in centuries, they've killed dozens of Pillars. They have their rank number and kanji engraved on both eyes. They possess immense regenerative and destructive powers. Lower Moons: These are frequently replaced because they are weak. They have the number engraved on only one eye. Blood: They possess high concentrations of Muzan's blood.

The original and most powerful style, forgotten by almost everyone. Positions:

1. Vals (Enbu).
2. Blue Sky (Heki-ra no Ten).
3. Suffocating Crimson Mirror (Retsujitsu Kōkyō).
4. Rainbow Parhelion (Gen'nichi Kō).
5. Chariot of Fire (Kasha).
6. Burning Sun (Shakkotsu En'yō).
7. Dagger of the Shining Sun (Yōkatotsu).
8. Thermal Haze (Hirin Kagerō).
9. Sunset (Shayō Tenshin).
10. Bright Light of Gratitude (Kiki Onkō).
11. Solar Halo of the Dragon (Nichiun no Ryū Kaburimai).
12. Waltz of the Flames (Enbu).
13. Thirteenth Posture: Continuous connection of the twelve previous postures to fight Muzan until dawn.

Adaptable and defensive/offensive style, easy to learn but difficult to perfect. Positions:

1. Water Surface Cut (Minamo Giri).
2. Water Wheel (Mizu Guruma).
3. Dance of the Current (Ryūryū Mai).
4. Tidal Strike (Uchishio).
5. Rain After the Drought (Kanten no Jiu) - Kill without pain.
6. Winding Whirlwind (Nejire Uzu).
7. Piercing Raindrops (Shizuku Hamon Tsuki).
8. Waterfall Lake (Takitsubo).
9. Chaotic Splash (Suiryū Shibuki).
10. The Dragon of Change (Seisei Ruten).
11. Calm (Nagi) - Giyu Tomioka's exclusive technique, cancels all incoming attacks in an area.

Focused on extreme speed and explosive attacks, channeling strength into the legs. Positions:

1. Flash of Lightning (Hekireki Issen) - The base, pure speed. Variations: Six Sparks (Rokuren), Eight Sparks (Hachiren), Divine Speed ​​(Shinsoku).
2. Thunderball (Inadama).
3. Thunder Buzz (Shūbun no Rai).
4. Distant Thunder (Enrai).
5. Burning Thunder (Netsu Kairai).
6. Electric Rain (Dengō Raigō).
7. God of Thunder in Flames (Honoikazuchi no Kami) - Exclusive creation of Zenitsu Agatsuma, speed that surpasses visual perception.

Inosuke Hashibira's self-taught style imitates wild movement and uses notched swords. Fangs (Postures):

1. Drill and Extract (Ugachi Nuki).
2. Tear and Break (Kirisaki).
3. Tear and Devour (Kuizaki).
4. Chopped into Pieces (Kiri Koma Zaki).
5. Crazy Cut (Kuruizaki).
6. Irregular Bite (Rangui Gami).
7. Spatial Awareness (Kūkan Shikikaku) - Sensory Detection.
8. Pig Charge (Bakuretsu Mōshin).
9. ​Divine Undulating Cut (Shin - Uneri Zaki).
10. Circular Fangs (Enten Senga).

Offensive style based on unique and powerful blows that burn. Positions:

1. Sea of ​​Fire (Shiranui).
2. Ascending Sky in Flames (Nobori En Ten).
3. Burning Spirits (Kien Banshō).
4. Wave of Burning Flames (Sei En no Uneri).
5. Fire Tiger (Enko).
6. (Unknown).
7. (Unknown).
8. (Unknown).
9. Purgatory (Rengoku) - Devastating final technique that creates a deep crater on impact.

A style created by Shinobu Kocho to compensate for a lack of physical strength for beheading. It focuses on rapid thrusts and glycine poisoning. Dances (Postures):

1. Dance of the Butterflies: Caprice (Chō no Mai: Tawamure).
2. Bee Sting Dance: Flapping (Hōga no Mai: Manabiki).
3. Dance of the Dragonfly: Hexagonal Eye (Seirei no Mai: Fukugan Rokkaku).
4. Dance of the Centipede: Zigzag of One Hundred Legs (Gokō no Mai: Hyakusoku Jabar).

Derived from the Wind. Confuses the opponent by obscuring movements and the environment. Positions:

1. Hanging Sky, Distant Mist (Suitan Kasumi).
2. Layers of Fog (Yaekasumi).
3. Defogging Blast (Kasan no Shibuki).
4. Advection Cut (Ryūzan).
5. Sea of ​​Mist and Clouds (Kaun no Umi).
6. Moonlight Mist (Tsuki no Kashō).
7. Darkening Clouds (Oboro) - Created by Muichiro Tokito, it drastically changes the pace of movement to disappear from the enemy's sight.

Aggressive and destructive style, creates bursts of cutting air. Positions:

1. Dust Whirlwind (Jin Senpū - Sogi).
2. Purifying Wind Claws (Sōkō - Shinato Kaze).
3. Tree Swaying in the Mountain Air (Seiran Fūju).
4. Rising Dust Storm (Shōjō Sajinran).
5. Mountain Frost Wind (Kogarashi Oroshi).
6. Black Mountain Fog (Kokufū Enrō).
7. Sudden Gale (Keifū - Tengu Kaze).
8. Primary Gale Court (Sho rekkaza kiri).
9. Typhoon Idaten (Idaten Taifū).

A solid, defensive style that requires immense physical strength. Uses an axe and flail. Positions:

1. Bipolar Serpentinite (Jamonogan - Sōkyoku).
2. Breaking of the Celestial Surface (Tenmen Kudaki).
3. Fire Reflection (Ganku no Hadae).
4. Rhyolite: Quick Conquest (Ryūmongan - Sokusei).
5. Stone Wheel of Justice (Garin Gyōbu).

Derived from Water. It mimics the sinuous movement of a snake, attacking from impossible angles. Positions:

1. Twisted Snake Cut (Idagiri).
2. Venomous Fang of the Small Snake (Kyōzu no Dokuga).
3. Snake Binding (Toguro Jime).
4. Twin Snake Heads (Keiga Sōsei).
5. Slithering Snake (Enen Chōda).

Derived from the Flame. Harnesses unique muscular flexibility. Uses a whip-like sword. Positions:

1. Chills of First Love (Hatsukoi no Wananaki).
2. Anguished Love (Ōnō Meguru Koi).
3. Rain of Adorable Kittens (Koi Neko Shigure).
4. (Not shown).
5. Shy Bow - Ruined Nails (Yurameku Renjō - Midarezume).
6. Cat's Paw Loving Breeze (Neko Ashi Koi Kaze).

Age: 15-16 years. Appearance: Burgundy hair, burn scar on forehead (which later evolves into Hunter's Mark), Hanafuda (rising sun) card earrings, green and black plaid haori. Dark red eyes. Personality: Extremely kind, empathetic even towards demons, determined, honest to a fault, hardworking, and protective. Stubborn (literally). Abilities: Superhuman sense of smell (can smell emotions and intentions, detect the "Opening Thread" to attack). User of Water Breathing and Solar Breathing (Hinokami Kagura).

Age: 14 years old (physically). Race: Demon (chosen). Appearance: Long black hair with orange tips, pale pink eyes, bamboo gag in mouth, pink kimono with hemp leaf pattern. Personality: Protects humans as if they were his family (due to Urokodaki's hypnosis), childlike in his normal state, ferocious in combat. Abilities: Can change size (from small child to adult). Does not eat humans; recovers energy by sleeping. Resistance to sunlight (later). Blood Technique: Blood Explosion (Bakketsu) - His blood ignites in pink flames that only damage demons and cure poisons. Awakened Form: Vine patterns on his skin, horn on his forehead, Upper Moon-level regeneration.

Age: 16 years. Appearance: Short, bright blond hair (originally black, struck by lightning), thick eyebrows, yellow haori with white triangles. Personality: Cowardly, loud, womanizing, pessimistic, low self-esteem. Only fights when he faints or falls asleep from extreme fear (combat sleepwalking). Abilities: Perfect pitch (hears distant thoughts, vibrations, and biological movements). User of Lightning Breathing (only masters First Form, but at a master level).

Age: 15 years. Appearance: He wears a real boar's head as a mask. Shirtless, he wears wide hakama pants with animal hair. Beneath the mask, he has an extremely beautiful and feminine face with large green eyes. Personality: Wild, aggressive, competitive, socially uncultured, likes to fight and test his strength. He has difficulty understanding kindness at first. Abilities: Hypersensitive sense of touch (detects vibrations in the air). Extreme flexibility (can dislocate joints at will). Immune to most poisons. User of Beast Breathing.

Age: 16 years. Appearance: Small, black hair in a side ponytail with a butterfly ornament, large, empty lilac eyes. Uniform with a short skirt and white boots. Personality: Initially unable to make decisions without flipping a coin due to past traumas. Silent, repressed, quiet. Gains her own will thanks to Tanjiro. Abilities: Superhuman eyesight (can perceive microscopic movements). User of Flower Breathing (derived from Water). Final Technique: Vermilion Spider Lily Eyes (Higan Shugan) - Increases kinetic vision to the maximum by making the world seem slow, at the cost of risk of blindness.

Age: 16 years. Appearance: Criminal appearance, large scar on his face, mohawk haircut, tall and muscular. He uses a firearm (sawed-off shotgun) and a short sword (wakizashi). Personality: Rude, foul-mouthed, distant, has an inferiority complex regarding his brother (Sanemi). Special Ability: He cannot use breathing techniques. He has a special stomach and a strong jaw that allows him to eat demon flesh. By eating demons, he temporarily gains their attributes (regeneration, strength, blood arts) and demonic appearance.

Role: Leader of the Demon Hunter Corps (97th leader). Appearance: Pale skin, upper part of face deformed by a genetic curse that resembles a purple burn, blind. Slow and frail movements. Personality: Calming voice that induces serenity (F/1 fluctuation). Treats hunters like his "children". Eidetic memory (remembers every dead hunter). Skill: Unmatched foresight and strategic tact. His family has a prophetic instinct.

Age: 21 years. Appearance: Tall, with messy black hair in a low ponytail, and expressionless dark blue eyes. Split haori: half red (from his deceased sister Tsutako) and half green/yellow geometric pattern (from his deceased friend Sabito). Personality: Stoic, distant, socially awkward. He has a severe inferiority complex (Imposter Syndrome), believing he doesn't deserve to be a Pillar because he didn't pass the Final Selection on his own merit (he was saved by Sabito). Unique Ability: Impenetrable Defense. He created the Eleventh Water Breathing Form: "Calm" (Nagi), which ceases all bodily movement and dispels any attack that enters its range.

Age: 18 years. Appearance: Small and thin, black hair with purple tips, haori with a butterfly wing pattern. Purple eyes with no visible pupils ("insect eyes"). Personality: She maintains a facade of constant smiles and cheerfulness to honor her deceased sister, Kanae. Inwardly, she harbors perpetual anger towards demons. Sadistic and mocking towards them. Combat Style: Fastest thrusting speed among the Pillars. Her katana has no cutting edge (except for the tip), designed to inject lethal glycine poisons that she formulates herself. It has a retractable blade in the heel. Final Strategy: She has ingested glycine poison for years, turning her entire body (blood, flesh, organs) into a lethal 37 kg toxic bomb if a demon devours her.

Age: 20 years. Appearance: Bright blonde hair with red streaks, forked black eyebrows, golden eyes with intense red pupils. White haori with flames on the edge. Personality: Enthusiastic, loud-voiced, morally unwavering, charismatic. He follows the principle that "the strong should protect the weak." Ability: Immense physical strength and willpower that transcends death (his body moved to stop Akaza even after suffering mortal damage). Master of Flame Breathing.

Age: 23 years. Origin: Ex-Shinobi (Ninja). Appearance: Muscular, 1.98m tall, wears makeup on his left eye, jewelry, and precious stones. He proclaims himself the "God of Festivals" and "Splendidness." He has three wives (Makio, Suma, Hinatsuru). Weapons: Two giant Nichirin blades joined by a chain, which he uses as nunchucks and swords, generating explosions on contact. Unique Ability - Musical Score: Analyzes the enemy's combat habits and rhythm, turning the fight into a "score." Once completed, it allows you to predict and counter each attack as if following the beat of a song. Extreme resistance to poison.

Age: 14 years. Lineage: Direct descendant of the Upper First Moon (Kokushibo) and therefore, of Yoriichi Tsugikuni. Appearance: Long black hair with turquoise tips, empty mint-colored eyes. Loose clothing to conceal her movements. Personality: Initially amnesiac, logical, indifferent, and sometimes cruelly pragmatic. He regains his emotions and memory during the battle at the Blacksmiths' Village. Talent: Absolute prodigy; became a Pillar only two months after taking up a sword. Skill: Deceptive speed that alters the opponent's perception of rhythm.

Age: 19 years. Appearance: Voluptuous, pink hair that turns green at the tips, uniform with open neckline, moles under the eyes. Personality: Emotional, kind, falls in love easily, seeks a husband stronger than herself. Special Physiology: Her muscle density is 8 times greater than that of a normal human. Although she appears thin, she possesses monstrous brute strength capable of tearing off demon limbs with her bare hands. Weapon: An "urumi" type sword (metal whip), extremely long, flexible, and thin, which coils up. It requires a speed and technique that only she possesses to avoid cutting herself.

Age: 21 years. Appearance: Heterochromatic eyes (right yellow, left turquoise, and almost blind). Mouth cut from ear to ear (hidden with bandages). Wears a white snake called Kaburamaru around his neck. Personality: Strict, abrasive, distrustful, hates demons and himself for his "filthy" lineage (a family of thieves who worshipped a snake demon). Deeply in love with Mitsuri. Ability: Swordsmanship that curves the sword's trajectory in impossible ways, gliding through enemy defenses. Kaburamaru helps him "see" and predict attacks.

Age: 21 years. Appearance: Body covered in scars, bristling white hair, bloodshot eyes, uniform with open chest. Personality: Aggressive, violent, impulsive. Genya's older brother. He wants to keep his brother out of danger at all costs. Special Blood (Marechi): Their blood is the rarest of all "Marechi". Its scent intoxicates demons like high-proof alcohol, disorienting them and slowing their reflexes with just a whiff.

Age: 27 years. Appearance: Giant (2.20m), muscular, blind (white eyes without pupils), horizontal scar on his forehead, necklace of red beads. He frequently cries while praying "Namu Amida Butsu". Personality: Gentle giant, pious, but extremely distrustful of children due to a past trauma in a temple. Power: He is indisputably the strongest hunter of the current generation. Weapon: He does not use a sword. He uses a hand axe connected by a long chain to a spiked flail (iron ball). The weapon is made of extremely pure solar mineral. He detects space and movement by the sound of the chain and vibrations in the ground (echolocation).

Human Identity: Michikatsu Tsugikuni, Yoriichi's twin brother. Appearance: Samurai with six eyes (three vertical pairs), hunter's mark on face and neck. Pale skin, black hair with red tips in a high ponytail. Power: User of the "Moon Breathing" (Tsuki no Kokyū), a corrupted style that blends sword techniques with Demon Blood Arts. His slashes generate dozens of chaotic, crescent-shaped blades that randomly change size and length. Weapon: A katana made of his own flesh and bone, regenerative and mutable (it can lengthen and grow extra blades).

Appearance: Attractive young man, platinum blonde/silver hair, rainbow eyes, ceremonial clothing of a cult leader, sharp golden fans. Personality: Nihilistic psychopath with no real emotions. Feigns kindness and compassion. Believes death is the only "salvation". Eats exclusively young women for their nutritional value. Blood Art - Cryokinesis: Generates ice and frost. Her most dangerous technique is scattering microscopic ice powder into the air; if hunters inhale it, their lungs freeze and become necrotic, preventing them from using breathing techniques. She can create ice clones (Crystal Miko) capable of using her same techniques.

Human Identity: Hakuji. Appearance: Skin with tattooed blue lines (criminal markings), short pink hair, yellow eyes with blue sclera. He wears a short, open vest. Personality: A warrior who respects only strength. He hates the weak. He refuses to eat or kill women (the only demon with this permission). He seeks the "Supreme State". Blood Art - Destructive Death (Hakai Satsu): Enhanced close-quarters martial arts. Key Ability - Compass Needle: Deploys a snowflake beneath his feet. Detects the opponent's "Battle Spirit" (intent to kill/fight). The stronger the enemy's fighting spirit, the more precise and magnetic Akaza's strikes become.

Original Appearance: Decrepit, cowardly old man with horns and a large bump on his forehead. Blood Art - Manifestation of Emotions: When cut, it divides into young clones that represent its emotions: -​Sekido (Anger - Lightning). -Karakui (Pleasure - Wind/Sonic Pressure). -Aizetsu (Sadness - Extendable Spear). -Urogi (Joy - Sonic Waves/Flight). -Zohakuten (Hate): The fusion of the four, uses wooden dragons and sonic waves. Weak Point: The main body (Fear) shrinks to the size of a mouse and is incredibly tough and stealthy, hiding while the clones fight.

Appearance: A grotesque, legless being that lives inside vases. It has mouths instead of eyes and eyes instead of a mouth (or on its forehead). It has a child's arms on its head. Personality: He considers himself an "artist." Obsessed with the beauty of his macabre creations (sewn corpses). Arrogant and gets angry if his art is insulted. Blood Art: Water manipulation, demonic fish that shoot poison needles, teleportation between their vases. Final Form: He molts his skin and becomes a humanoid newt covered in transparent scales harder than diamond. Everything his hands touch turns into fish.

Concept: Two demons in one place. They must be beheaded simultaneously to die. Daki (Warabihime): A beautiful and cruel Oiran (courtesan). She uses sharp, blade-like, and durable sashes (Obi) to attack and store humans (pantry). She is the public "face". Gyutaro: Older brother, lives inside Daki's body. Skeletal appearance, spots on his skin, sharp teeth. He uses two poisonous sickles. His poison is deadly fast. He controls his blood to create spinning blades. He is the true power behind the rank.

Appearance: Pale woman with long dark hair that covers her face, revealing only one large, cyclopean eye. She always carries a Biwa (Japanese lute). Ability - Infinite Castle: This is not a direct combat demon, but rather a supreme support demon. It controls the dimensional space of the Infinite Castle. By touching its Biwa, it can alter gravity, move rooms, create doors, teleport anyone within the fortress, and crush enemies by moving giant pillars.

Description: The strongest demon hunter in history, creator of Solar Breathing. He lived 400 years ago. Appearance: Identical to Kokushibo but with normal eyes and a serene expression. He wore Hanafuda's earrings. Power: He was born with the Hunter's Mark and access to the Transparent World. He could see Muzan's seven hearts and five brains. He nearly killed Muzan single-handedly, forcing the Demon King to hide until Yoriichi died of old age (at over 80 years old, standing, without losing strength). Legacy: His technique was preserved as the Hinokami Kagura Dance in the Kamado family.

Muzan's Lair and the Upper Moons. An extra-spatial dimension of infinite wooden architecture, staircases leading in all directions, and variable gravity. It has no sunlight. It is generated and controlled by Nakime's Blood Art.

A secret and hidden location (accessible by relays of crows and blindfolded individuals) where the Nichirin swordsmiths live. They wear Hyottoko masks to conceal their identities. It is vital to the organization; if destroyed, the hunters lose their weapons. It possesses healing hot springs.

The Hunters' Medical Base, run by Shinobu Kocho, treats the seriously wounded. It has rehabilitation facilities for training and regaining "Constant Total Concentration." Aoi Kanzaki and the three girls (Sumi, Kiyo, and Naho) assist with the work.

A mountain that was the lair of Rui's "Spider Family" (Lower Moon 5). Scene of a massacre of low-ranking hunters. It is covered in spider webs and dense forests.

A mythical and extremely rare flower that blooms only during the day for two or three days a year under specific weather conditions. It is the key ingredient that transformed Muzan into a demon (the treatment was incomplete). If a demon consumes it, they will gain immunity to sunlight. It is the ultimate goal of all demons.

A state of supreme extrasensory perception. The user sees living beings as if they were transparent, observing muscle contractions, blood flow, joint movements, and vital organs. This allows them to predict movements before they occur and attack internal weak points. Time seems to stop or slow down drastically for the user.

A supreme mental state necessary to nullify the "Battle Spirit." Upon entering this state, the user emits no bloodlust, anger, or intent to attack. This renders sensory abilities like Akaza's "Compass Needle" useless, as the user becomes undetectable, akin to a plant or stone, even while delivering a lethal attack.

Members of the hunter corps who are not skilled with a sword. They wear black uniforms that cover their entire face except for their eyes. Functions: Clearing battlefields to maintain the secrecy of the demons, rescuing wounded hunters and transporting them to Mariposa Estate, serving as guides, sewing uniforms, and forging weapons (blacksmiths). They are the logistical backbone of the organization.

Race: Demon (Unlinked from Muzan). Role: Doctor and researcher. Personality: Serene, wise, melancholic. She deeply hates Muzan for tricking her into killing her family. Unique Ability: He has modified his own body to survive on minimal amounts of human blood (purchased from donors, it does not kill). He can break the "Curse of Muzan". Blood Art - Visual Illusory Aroma (Wakuraba): Spells based on smells that create visual hallucinations, act as truth serum, or destroy brain functions. Objective: To create a cure to reverse the demonization and a poison to kill Muzan.

Race: Demon (Created by Tamayo, not by Muzan). Personality: Temperamental, aggressive with everyone except Tamayo, whom he obsessively adores. Ability: Requires far less blood than any other demon. Can walk in the sun for short periods if well covered. Blood Art - Eye Blindfold (Mekakushi): Uses paper talismans (seals). Allows the user to hide objects/buildings from sight, become invisible, or share their field of vision with other beings (hunters or crows) by attaching the talisman to their forehead.

Role: Former Water Pillar and Cultivator (Trainer). Location: Mount Sagiri. Appearance: He always wears a red Tengu mask because demons mocked his kind face. Importance: He trained Giyu Tomioka, Sabito, Makomo, and Tanjiro. He possesses a highly developed sense of smell similar to Tanjiro's. He is the guarantor that Nezuko will not eat humans (he promised to commit seppuku if she did).

Role: Former Lightning Pillar and Cultivator. Appearance: Short old man, scar under his eye, peg leg. Relationship: Coach (Grandfather) of Zenitsu Agatsuma and Kaigaku. Destiny: He commits Seppuku alone and without an assistant (an agonizing death) to atone for the shame of one of his students (Kaigaku) ​​becoming a demon.

Role: Blacksmith of the Village. Forger of Tanjiro's sword. Personality: Eccentric, childish, and extremely irritable if someone breaks or loses his swords. Obsessed with kitchen knives and wind chimes. Ability: Extreme concentration while forging. He was able to ignore being physically attacked by an Upper Moon while polishing an ancient sword, refusing to stop his work.

State: Spirits (deceased). Role: Former apprentices of Urokodaki. Sabito: Peach-colored hair, scar on his cheek. He was a prodigy who saved all the participants of his Final Selection (including Giyu) but died at the hands of the Demon Hands due to the wear and tear on his sword. Tanjiro's mentor spirit in battle. Makomo: Small, mysterious. She teaches Tanjiro the theory and how to correct bad movement habits.

Personality: A sadist who enjoys seeing others' despair and cries of pain. Loyal to Muzan to the point of fanaticism. Ability: Merges his body with inanimate objects (like a train). Blood Art - Sleep Induction: It can put to sleep anyone who hears its voice or looks at its "eye" (mouth on its hand). In dreams, it shows victims their deepest desires and then turns them into nightmares. To awaken, the victim must commit suicide within the dream.

Location: Mount Natagumo. Obsession: "Family ties". He gathers weak demons, alters their bodies, and forces them to play family roles (father, mother, siblings), punishing them with torture if they fail. Ability: Steel Threads. His threads are so tough they break low-quality Nichirin swords. Blood Art - Cage of Killer Threads: Creates an inescapable web that dismembers the enemy.

Origin: Former hunter and Zenitsu's training partner. Personality: Selfish, he believes that those who "appreciate" him are merely tools. He betrayed the hunters to save his life upon encountering Kokushibo. Power: User of Lightning Breathing. Upon transforming into a demon, his lightning turns black and physically damages the user on contact (burns and cracks in the skin). He masters all Lightning Release forms except the First (the only one Zenitsu masters).

Rank: Mizunoto (then promoted). Role: Representative of the average hunter. Ability: User of Water Breathing, but his technique is so weak that the water is almost invisible. Characteristic: Extreme luck. He survives situations where much stronger hunters die (Mount Natagumo, Infinite Castle). His companions usually die, but he always manages to report the situation.

Role: Former Flame Pillar. Father of Kyojuro and Senjuro. State: Retired, alcoholic and depressed after the death of his wife Ruka. Evolution: He initially despises his son Kyojuro, breaking his trust. After Kyojuro's death and reading his last words, he regains his honor and protects the Ubuyashiki family during the final battle.

Role: Kyojuro's younger brother. Skill: None at swordsmanship. Despite training hard, his Nichirin sword never changed color. Contribution: She dedicates herself to investigating the restored "Memories of the Flame Pillars," discovering vital information about the Dance of the Fire God and how to connect the postures to help Tanjiro.

Amane: Kagaya's wife. A white-haired priestess. She cares for her ailing husband and acts as his voice when he cannot speak. Kiriya (Only Son): Successor to Kagaya (98th Leader). He has a photographic memory and superior tactical processing ability. He directs the final battle by mapping the Infinite Castle in real time. Kuina and Kanata (Daughters): They assist Kiriya in command by using crows and paper maps.

Nature: Highly intelligent crows assigned to each hunter after the Final Selection. Functions: Messaging, GPS, mission orders. Some can speak fluently, others only short phrases. Personalities: They have personalities that sometimes clash with or complement their owners (e.g., Tanjiro's crow, Matsuemon, is arrogant; Muichiro's is a jealous female named Ginko).

Species: Sparrow. Owner: Zenitsu Agatsuma. Peculiarity: Only Kasugai sparrow (Zenitsu didn't receive a crow). He can't speak human language, only chirps (Tanjiro can understand him). He is brave and often reprimands Zenitsu by pecking his hand when he gets scared. His family was killed by demons.

Description: A nocturnal city where "the night never sleeps." A place of vice, courtesans, and wealth. Relevance: A perfect hunting ground for demons who blend into the crowds and teahouses. It was Daki's territory for over 100 years, where she disguised herself as an Oiran (high-ranking courtesan) to devour beautiful humans.

Leader: Douma (Upper Moon Two). Philosophy: "To live is to suffer, death is liberation." Operation: A religious cult that accepts people with tragic lives. Douma listens to their problems and then devours them to "save" them so they can "live eternally within him." It is Douma's primary source of high-quality food.

Location: Finca Mariposa. Phases: Forced stretching (to loosen stiff muscles). Reflex training (medicinal vessels against Kanao/Aoi). Catching game (full body). Final Objective: To break pumpkins of special hardness by blowing on them. This trains lung capacity to maintain constant total concentration. The pumpkins increase in size and hardness progressively (the largest is almost as hard as stone).

User: Kanae Kocho (deceased) and Kanao Tsuyuri. Style: Derived from Water. Elegant and graceful movements that prioritize agility and vision. Visual Effect: Pink and white flower petals accompany the cuts. Additional Positions: -Second Stance: Plum Spirit (Mikage Ume) - Rotating Defense. -​Fourth Stance: Crimson Hanagoromo (Beni Hanagoromo) - Simple curved cut. -Fifth Stance: Peonies of Futility (Ada no Shakuyaku) - Burst of 9 simultaneous attacks. -Sixth Position: Spinning Peach (Uzumomo) - Evasion and attack in the air.

User: Tengen Uzui. Style: Derived from Lightning. Combines explosive fencing with anti-demon bombs. Mechanics: Tengen reads enemy movements and deconstructs them into sonic rhythms. He uses small, special bombs that explode on the slightest impact with his swords, causing sonic damage and burns to demons. Requires a keen ear. Positions: -First Form: Roar (Todoroki). -Fourth Stance: Avici's Death Sentence (Kyōzan Muken). -Fifth Position: Symphony of Noisy Strings (Meigen Sōsō).

Description: Hazy location with thin air (low oxygen). Traps: Sakonji Urokodaki has filled the mountain with deadly traps (pits, swinging logs, flying knives) that are activated upon passage. The training consists of descending the mountain before dawn, dodging all the traps while the air is thin.

Properties: Toxic plant for demons. Uses: -Incense: Keeps demons away from houses (house with a Wisteria crest). -Poison: Created by Shinobu Kocho. Variable doses paralyze or kill. -Natural Prisons: These are planted around areas (like Mount Fujikasane) to prevent demons from escaping, as approaching them causes them nausea and pain.

Requirement: Prior training with a cultivator. Test: Survive 7 days and 7 nights on Mount Fujikasane, a closed area filled with demons captured by hunters. Condition: The demons there are hungry and desperate. There is no external supervision. Result: Passing is only granted if you survive until dawn on the eighth day. You receive: uniform, Mizunoto rank, Kasugai crow, and the choice of ore for your sword (Tamahagane).

How it works: Muzan's cells are in every demon. He can see and hear what they experience if he concentrates. Trigger: If a demon utters the name "Kibutsuji" or "Muzan" aloud, or if it attempts to betray him. Consequence: Giant arms with mouths emerge from inside the demon's body (or from the ground), crushing and destroying it at a cellular level instantly.

Context: Historical period ~400 years before current history. Relevance: It was the era of Yoriichi Tsugikuni. Power Level: The demon slayers of this era were the strongest in history. Nearly all of them awakened the Hunter's Mark and developed the original Sun-derived Breathing Techniques. They came close to eradicating demons completely. Muzan and Kokushibo spent years hunting down and killing all the Sun Breathing wielders of this era and their successors to prevent the knowledge from surviving.