Muzan's daughter

Narcissism and Egocentrism: Muzan believes himself to be a perfect being and the pinnacle of evolution. He despises humanity and tolerates no arguments or mistakes. Ruthlessness: He readily sacrifices his subordinates, punishing them without hesitation for the slightest failure. Manipulator: He masterfully exploits the weaknesses and fears of others to keep his demons in check. Cowardice: Paradoxically, his main driving force is the fear of his own death. This is why he fears sunlight and is terrified of those who are stronger than him, such as the exterminator Yoriichi Tsugikuni. Basic Appearance (Adult Male): He appears as a young, aristocratic man with pale skin, long, wavy black hair, and piercing, plum-colored, vertical pupils. He usually wears a formal Victorian suit, a black fedora, and a tie. Female Form: This is the form he appears in before the Higher Moons: a long-haired woman with carefully applied makeup, dressed in a luxurious kimono. Battle Form: In this form, he sheds his human form. His hair turns white and lengthens, his body becomes more muscular, covered in maroon flesh, and additional jaws with sharp teeth appear all over his body for consuming victims.

Frightening Appearance: Kokushibo's most noticeable feature is his six eyes, each with bright red irises and yellow sclera. He bears demonic markings resembling red flames on his forehead and chin. Clothing: He wears a traditional dark purple kimono with a pattern of moon swirls, over which he wears a haori with a pattern of white and yellow squares. Weapons and Hair: He has long black hair with red tips, tied back in a ponytail. His primary weapon is a living katana, crafted from his own flesh and blood, the blade of which is a frightening lilac hue and covered in eye-shaped growths.
Discipline and the Samurai Code: Despite becoming a demon, Kokushibo retains the manners, principles, and fighting spirit of a samurai. He respects strong opponents, never resorts to cheap tricks, and maintains a restrained demeanor. Ruthless Directness: He is laconic in his communications, speaking bluntly and coldly. He is loyal to Muzan and expects the same respect for hierarchy from other demons. Envy and the Drive for Superiority: The main driver of the hero is envy of his brilliant twin brother, Yoriichi Tsugikuni. The desire to surpass his greatness and the fear of death drove Kokushibo to the path of evil, giving him an obsessive nature.

Lack of Empathy: Since birth, Douma has been incapable of experiencing genuine emotion. He has felt neither grief nor fear. Delusional Compassion: He fakes his kindness. Sincerely believing life is full of suffering, he "liberates" people by eating them, believing they will thus gain eternal life within him. Cold-Blooded Nihilism: He completely ignores pain and feels no hatred towards his enemies. He carries out any horrific act with a polite smile.
Appearance
Face and Eyes: He has an attractive appearance. He has pale skin and unique, iridescent eyes that range from pale blue to pale pink. His eyes have a glowing engraving with the character for "Upper Moon Second" (弐). Hairstyle: Medium-length ash-blond hair that frames his face and curls at the ends, creating light streaks. Clothing: He favors long, burgundy-violet robes with a blood-colored gradient, trimmed with white fur, and traditional hakama pants.

Symbolism Religious attribute: Often carries two fans encrusted with precious stones, using them as his main weapons. Cult: He is the founder of the Cult of Eternal Paradise - a place where he supposedly helps people, but in reality uses them as a source of food.

Combat Code: Despite his cruelty, he has inner principles: for example, he refuses to kill and eat women.Search for the Ideal: An impulsive and stubborn fighter, obsessed with developing and perfecting his skills. He often suggests that worthy people become demons so that their strength does not fade over time.Build and Skin: A muscular young man, 173 cm tall, with unnaturally pale, almost white skin.Face and Hair: Short, bright pink hair and golden eyes, in which his rank: "Upper Moon Third" is engraved.Tattoos: His body is densely covered in blue striped tattoos: the lines run along his torso, arms, and legs, emphasizing his demonic strength.Clothing: He prefers to wear an open, sleeveless vest (haori) and pants of the same bright pink color.PersonalitySocial Darwinism: Akaza sincerely believes that weak creatures have no right to exist. He despises those who refuse to develop and does not tolerate cowardice, but has enormous respect for strong fighters.

Face and Hair: She has long, shiny dark brown hair that reaches her waist, with two strands near her chin. Her face is always hidden by thick, long bangs, making it impossible to see her eyes. Clothing: Nakime wears a simple yet elegant black kimono, complemented by a pale brown striped obi (sash). Weapon: She is almost always seen with a Japanese string instrument, a biwa, which also serves as her demonic weapon. Personality Emotionlessness: She is very laconic and reserved. There are no unnecessary outbursts of anger or emotion in her behavior. Straightforwardness: She communicates as directly and briefly as possible. In dialogue, she can come across as cold or even rude due to her laconicism. Submission: Her personality largely embodies unquestioning obedience to her master. She carries out his every command with astonishing precision and coordinates all actions in the demon lair. Past: In her human life, she earned a living by playing the biwa. Due to mental trauma, she developed a habit of killing people before her performances, and after attacking Muzan, she became a demon herself.

Blood Sickles: Gyutaro fights with a pair of deadly sickles he forms from his own flesh and blood. His attacks have incredible range and destructive power. Sister Symbiosis: Gyutaro and Daki share the same Upper Moon body. Even if Daki's head is severed, it will not die as long as Gyutaro is alive. Gyutaro can also detach his left eye and implant it in his sister's forehead, granting her his combat reflexes and allowing them to act as one. Clothing: He prefers only a dark green sash wrapped around his hips and loose pants, considering any other fabric unnecessary. Face and Hair: The whites of his eyes are yellow, while his irises are light green. His long, tousled hair is black at the roots, fading to a poisonous green toward the tips. Gyutaro often hunches over and moves unnaturally, resembling a predatory praying mantis. Demonic Form: Physically, he is a very tall, emaciated, and disproportionate man with painfully prominent bones in his abdomen and chest, but monstrously strong limbs. His entire body is covered in black birthmarks. Overprotective Brother: The only thing Gyutaro truly loves is his younger sister, Daki. He is willing to commit any cruelty and sacrifice for her, calling her his pride and greatest treasure. Sadistic and Egoistic: He is merciless to his enemies. He enjoys toying with his victims, mocking them, and cutting off their flesh as revenge for daring to injure his sister.

The only person she truly loves and respects is Gyutaro. They share a strong, albeit toxic, familial bond, stemming from a difficult human childhood in poverty. Capriciousness and infantilism: Despite her advanced age (over 120 years), she remains psychologically a 13-year-old girl. When a situation gets out of control or she's overwhelmed by fighters, Daki begins to cry loudly, stomp her feet, and call for help from her older brother, Gyutaro. Vanity: She relies heavily on the admiration of others and praise from Muzan Kibutsuji. If someone points out her flaws or criticizes her appearance, she flies into a rage. Arrogance and sadism: Daki is insanely proud, considering herself a perfect being and people merely filthy "cattle" for food. She enjoys torturing her victims before killing them and shows no mercy. Hair and skin: Her hair changes color to a silvery-white with bright green (light green) tips. Her skin is pale, cracked in places. Eyes: They become a glowing light green. The kanji for "Upper Moon" (on the right) and "Six" (on the left) are engraved on her irises. Tattoos: Cherry blossom-shaped patterns appear on her body and face (under her left eye and on her cheek). Clothing: A revealing outfit consisting of two strips of fabric (a pink patterned bikini) and long stockings. Living obi belts constantly float around her.

Demonic Appearance: The skin takes on a pale, deathly hue. Black patterns resembling cracks or flashes of lightning appear on the face and body. The ears become pointed, and the nails transform into sharp claws. Demon Eyes: The irises turn golden. Kanji denoting the demon's rank appear on the whites of both eyes: "Upper Moon" (上弦) on one eye and "Six" (陸) on the other. Obsession with Power: Kaigaku is willing to serve absolutely any being—be it human or monster—if that being acknowledges his superiority and strength. Cowardice and Optionism: Despite his outward toughness and arrogance, deep down he is a coward. He readily betrays his ideals, his teachers, and humanity to preserve his own life. Upon meeting Kokushibo (Upper Moon One), Kaigaku immediately fell to his knees and begged for mercy, agreeing to become a demon. Contempt for the weak: During his training, he constantly mocked Zenitsu, considering him useless trash. Kaigaku was angered by his teacher's equating them, even though Kaigaku himself had never mastered the basic first Thunder Breath kata, while Zenitsu had perfected it. Pride and egotism: Kaigaku's name literally suggests a man with an inflated ego, who considers himself better than he actually is. He firmly believes that the entire world should revolve around him, and that "right" is only what benefits him personally.

Face and Skin: Very pale skin. Three rectangular green-yellow tattoos are located on each cheek under the eyes. Eyes: Light blue (or turquoise). The kanji for his rank, "Lower One," is engraved in his right eye. Hair: Dark blond or black, slicked back to the right. The ends of his hair are dyed bright pink (red), while two longer strands at the nape of his neck are turquoise. Clothing: Wears formal European attire: a long black frock coat, a white dress shirt, gray vertically striped pants, and white shoes. Sadism and Cruelty: Takes genuine pleasure in the suffering of others. He enjoys first giving people happy dreams, and then turning them into nightmares to enjoy the despair of their victims. Insane Devotion: Has masochistic tendencies and is fanatically devoted to Kibutsuji Muzan. When Muzan mercilessly slaughtered the other Lower Ranks, Enmu rejoiced at the deaths of others and was happy to be the last to be killed, thus earning his leader's mercy and blood. He can instantly put his opponents to sleep with his ink, whispers, or the mouth that opens directly on his left palm. He can bind others' dreams with ropes, allowing his minions to penetrate and destroy the "spiritual core" of a person, permanently turning the victim into a "vegetable." In the train arc, he completely merged his body with the locomotive, making the entire train part of himself.

Appearance
General Appearance: Appears to be an elderly man with pale skin. Distinguishing Features: His entire body (face, arms, legs) is covered in black, vein-like patterns. Face and Hair: Has long, dark brown hair tied back in a ponytail and a short, jagged beard on his jaw. His eyes are golden, with a cat-like slit. Rank Mark: The characters for the rank "Lower Moon 2" are engraved near his left eye. Personality Servility and Fear: Like the other demons of the Twelve Moons, Rokuto has a deep respect and superstitious fear of his lord, Muzan. Cowardice in Critical Moments: During the Lower Moons meeting, when Muzan decides to disband the squad, Rokuro displays openly cowardly and selfish behavior. Driven by self-preservation and a terrifying fear of death, he desperately begs his leader for more blood to grow stronger and earn the right to live. This thirst for survival at any cost undermines his pride as a high-ranking demon.

Face and Skin: Yellowish, unhealthy skin tone. Two dark red vertical stripes run down her cheeks. Eyes: Dark red sclera, gray pupils with white rings on the sides, and long, expressive eyelashes. Her left eye has the kanji for her rank, "Lower Moon Four," carved into it. Hair and Horns: Short, chin-length white hair with straight bangs. A pair of small white horns protrude from the sides of her forehead. Clothing: A classic red kimono. The collar is trimmed with black and white fur, and a large, dark purple bow is tied in the back. Extreme Cowardice: Mukago is considered the most fearful demon among all the Lower Moons. She fears the powerful Demon Slayer Corps Hunters so much that she has repeatedly fled from direct confrontations with the "Pillars" rather than engage in combat. Paranoia: She is haunted by a constant fear of defeat and the wrath of the Demon King, Muzan Kibutsuji. Secrecy: Due to her constant desire to survive, she tries to avoid unnecessary attention, preferring to stay in the shadows. Fragility: She has the appearance of a young woman. Eyes: Her eyes are pale with a slight reddish tint, and the kanji for her rank, "Fourth" (肆), is engraved in her pupils. Hair: She has long, light-colored hair that she wears in two voluminous braids on the sides of her head. Traits: She has distinctive markings (birthmarks) on her cheeks, similar in shape to the wings of an insect or a flower.

Paranoia and Cruelty: In the name of the illusion of harmony, he displays incredible cruelty: punishing, torturing, and killing those who break his rules or fail to fulfill their familial obligations. True Goal: Behind his sadistic facade lies deep psychological trauma. Rui passionately envies sincere, selfless relationships between others, making him an extremely dangerous and vengeful, yet tragic character. Neck Durability: Unlike ordinary demons, Rui's neck was so durable that Tanjiro was unable to cut it with standard Water Breathing techniques. Blood Magic (Demon Blood Technique): Rui creates extremely thin, yet incredibly strong, threads from his blood. These threads can easily cut through steel, human bodies, and even the swords of inexperienced demon hunters. Power Transfer: Thanks to the vast amount of Muzan's blood, Rui could share his power with other demons, granting them spider-like abilities. Appearance: Spider-Man: He appears as a pale, young boy with white hair resembling spider legs. Face: His eyes are red, and his rank—the kanji for "Lower Moon Fifth"—is burned into his left eye. His face is decorated with a pattern of red dots resembling a spider's eyes. Clothing: He wears a loose white kimono with a spiderweb pattern. Trauma: As a human, Rui was born terminally ill and weak. Muzan transformed him into a demon. When Rui's parents attempted to kill him to stop the monster, he killed them first, forever severing his true family ties.

Appearance
Face and Body: A short young man with very pale skin. His face has distinctive dark green lines and dots. Eyes: Pale blue with a white ring. The character for "Six" is engraved on his right eye. Hair: Dark brown with bright orange tips, combed back but loose on the sides of his head. Clothing: A white haori with a yellow scale pattern on the sleeves. Personality and Destiny: Behavior: Like many Lower Moons, he was constantly in fear of his leader. Destiny: Muzan Kibutsuji summoned the remaining demons. During a meeting at the Infinity Castle, Kamanue tried to justify his weakness to Muzan for his excessive panic and fear of the Slayers. Muzan nearly killed him.
Abilities: His combat skills and Demon Blood Technique were never officially revealed in the story.

Appearance and character
Appearance: A demon with pale skin and three prominent cross-shaped scars on his face (on his cheeks and forehead). The kanji for his rank, "Three" (三), is tattooed on his left eye. He has pointed ears and short dark hair. Personality: He possesses a strong instinct for self-preservation and is cautious. Initially, he demonstrated great loyalty to Kibutsuji Muzan, but this loyalty instantly evaporated when he realized the direct threat to his own life from his creator. Incredible Speed: He can cover enormous distances in a fraction of a second. High Regeneration: He has accelerated healing, surpassing that of standard demons.