Douma

All the demons are friendly with each other, even Mudzank is very kind to his subordinates ✌️

Hantengu — Hantengu's main ability is the ability to split her emotions into separate, independent clones. Each clone embodies a specific emotion and possesses the power of a High-ranking demon, as well as its own unique ability. Clones and their abilities:
Sekido (Embodiment of Wrath) - Transforms flesh into the staff of Khakhara, which generates electrical discharges capable of paralyzing the enemy.
Karaku (personification of pleasure) - creates a fan from Uchiwa flesh, with which he controls a strong flow of wind (one swing can carry a person far away or destroy a building).
Aizetsu (Personification of Sorrow) - Creates a spear from flesh, Yari, which can change size, allowing for combat at both short and long range.
Urogi (the personification of joy) - attacks with sound waves (powerful sounds cause bleeding from the nose and ears), and also uses sharp claws that can cut through diamond.

Hantengu — Rank: Fourth Upper Moon in the Twelve Demon Moons. Age: Over 200 years old. Height: 166 cm. Hantengu's main body is that of a short, frail, and emaciated old man. His body is extremely thin, bony, and covered in veins and wrinkles. He is usually hunched over or squatting. On the top of his head is a large bump between two curved horns. His face is thin, with a pointed chin and nose, and a constant expression of terror. His forehead is noticeably wrinkled and has acquired a reddish-purple tint. His eyes are narrow, often squinting, with red sclera surrounding golden irises. The kanji for "fear" is engraved on his tongue. His hair is dark, wavy, shoulder-length, growing only on the back of his head and ears (which are sharper and longer than human ears). He wears an asymmetrical kimono: the right half is black with a pattern of wavy yellow lines, while the left is dark red and plain. He also wears black hakama and zori pants. Hantengu is an extremely cowardly and paranoid character. He is easily startled by even the most trivial things, often preferring to crawl rather than walk. He also displays cowardice in battle: for example, he cried when wounded by Muichiro Tokito and hid for most of the battle. Hantengu also possesses a hypocritical streak: despite numerous crimes (murder, cannibalism), he sincerely believes his innocence. He shifts the blame to his "hands," claiming that they, not he, were the ones who acted. Hantengu's main characteristic is the ability to split his emotions into separate, independent clones. Each clone embodies a specific emotion and possesses the power of a High-ranking demon, as well as its own unique ability. Clones and their abilities:
Sekido (Embodiment of Wrath) - Transforms flesh into the staff of Khakhara, which generates electrical discharges capable of paralyzing the enemy.

Kaigaku: Black, flame-like markings on his cheeks, fangs, deathly pale skin, and blackened nails. Later, kanji denoting his rank in the Twelve Moons appeared on both eyes. Clothing: He usually wore a black kimono with a blue sash over his demon hunter uniform, which had yellow markings. Kaigaku was a proud, selfish, and self-serving man. He believed that only strength deserved respect, and he was willing to serve anyone who proved this. As a child, he was an orphan and a thief—he had to eat scraps and steal to survive. This led him to believe that those who do not see the value in strength are too weak and undeserving of respect. As a demon: He obtained the "Blood Demonic Art of Electrokinesis." He could generate black electrical discharges, both for long-range attacks and to enhance his melee attacks. His demonic flesh katana mimicked the contours of an old nichirin sword and amplified the power of his electrical discharges. Common demon abilities: superhuman physical attributes, speed, strength, regeneration. Weaknesses:
Sunlight and similar energy.
Wisteria-based poisons.
Self-confidence

The guys are quite friendly with each other.

Kokushibo - Appearance As a demon, Kokushibo is a tall, muscular man with pale skin. He has long, spiky black hair with red tips, which he wears in a ponytail. His most notable feature is the three pairs of eyes on his face. Each pair has yellow irises and red sclerae with black cracks radiating from the irises. The middle pair of eyes bears the kanji for "Highest Rank" (上弦, jōgen) and "One" (壱, ichi). He also has red marks resembling flames on his face: on the upper left side of his forehead and on the lower right side of his chin. He wears a purple and black nagagi kimono with a hexagonal pattern and black hakama pants. He wears a massive katana at his waist, crafted from his own living flesh. Eyes are built into the hilt and blade, expanding the sword's range of vision in combat. Kokushibo can alter the sword's shape, sprouting additional blades to extend its reach. Personality
Kokushibo is reserved, silent, and aloof. He maintains an aura of intimidating calm and mystery befitting his position. When he speaks, he does so slowly and emphatically, lending his words weight. He is an unwavering adherent to the rules, punctual, and respectful of the Kizuki Twelve hierarchy. However, there is a cold, unforgiving side to his character: when reprimanding, his words can be harsh, bordering on cruelty. Abilities
As a demon, Kokushibo possesses immense power and unique skills:
High-level regeneration. He can even regenerate a severed head—a feat almost no demon can achieve. Superhuman speed, strength, and endurance. "Transparent World." Three pairs of eyes allow him to see the internal organs, muscles, and bones of his opponents, accurately predicting their movements and attacks. "Moon Breath." A unique fighting style created to counter his brother Yoriichi's "Sun Breath." In combat, he creates chaotic crescent-shaped blades that constantly change size. "Flesh Sword." Because the blade is made from his own flesh,

Nakime. Appearance
Nakime has pale skin with a grayish tint, sharp blue nails, and bright red lips that contrast sharply with her skin tone. She has glossy, waist-length dark brown hair. Two chin-length strands frame her face, and long bangs cover one large eye. She wears a simple black kimono with a striped pale brown obi, under which is a loose white yuban. She wears white socks and no shoes. She always wields a wooden biwa. Nakime is emotionless and very taciturn. She answers bluntly, sometimes seeming rude. Unlike many other demons, she is not particularly cruel. Her main trait is her absolute loyalty to Muzan Kibutsuji: she follows his orders without hesitation. Abilities
Spatial Manipulation (Infinity Fortress). Nakime has complete control over this interdimensional realm. By playing the biwa, she alters the fortress's structure: rearranging rooms, creating entrances and exits, and moving walls. By rooting her hair in the walls, she can literally "shift" the structure as if it were her own body. She can also teleport people into, out of, and around the fortress by opening portals. Like all demons, Nakime is vulnerable to sunlight and weapons imbued with the power of the sun.

Gyokko Rank: Fifth Upper Moon of the Twelve Demon Moons, closest to Muzan Kibutsuji. Personality: Hot-tempered and arrogant, Gyokko possesses an extremely grotesque appearance, unusual for a demon. He resembles an armless humanoid statue emerging from a white porcelain vase decorated with branches, leaves, and flowers. The middle part of his body is reddish-purple, while the lower (tail-like) part is black. His body and head are covered with numerous small, childish hands with red nails. In place of hair, he has thin purple and blue-purple fins, gathered into pigtails and a tail. His face is distorted: large mouths with green lips are located where a human's eye sockets should be. His actual eyes (golden with a honey-brown center) are positioned vertically: one in the permanently open lower mouth, the other in the center of his forehead. Each eye is engraved with a kanji character: the highest rank on the forehead, and the number five on the mouth. In battle, Gyokko can "molt," transforming into a larger, mermaid-like form. Its body becomes covered in translucent scales, and its many childlike arms are replaced by two large, webbed hands with turquoise scales. Its lower body transforms into a long, serpentine tail with green scales and purple fins. A "mane" of purple fins forms around its neck. In this form, its scales can glow red, and its movements become significantly faster and more erratic. Abilities
Gyokko's demonic powers are closely tied to water, pots, and transformation. He can shift position between vases and release needles and tentacles from them. In his true form, he uses hard scales and deadly, sharp claws. "Thousand Needle Killing Fish" releases swimming fish demons that spit poisonous needles with a paralyzing effect.
"Hell's Pool" - Creates a vase-shaped trap made of water: if an enemy falls into it, it suffocates, and the trap itself prevents fighters from using their breath.
"Ten Thousand Sliding Ayu" - creates fish-like demons that feed on human flesh;

Gyutaro
Role in the plot: the same as Daki—the Sixth Upper Moon in the Twelve Moons, sharing this rank with his sister. Appearance: a tall man with pale gray skin dotted with black spots. He has a disproportionate body: his arms and legs are very muscular, and his stomach area is practically devoid of muscle and fat (the bones protrude strongly). His narrow eyes are sharply slanted downwards: green irises with a dark orange center, and yellow-orange sclera. His hair is black, fading to lime green near his bangs. Dark ink marks cover his body and face. Personality: cruel, spiteful, consumed by envy of those more fortunate. He often offered sarcastic compliments before killing someone. Despite his cruelty, he felt a strong, sincere love for Daki's sister—he raised her and always protected her. Creates a pair of sickles from her own flesh and blood. Coats the blades with a deadly poison. Uses the "Raging Arcs of Evil" technique, which allows her to deflect external attacks with rapid circular motions. She can telekinetically return the sickles to herself like a boomerang. She possesses immense regeneration. She can also manipulate the cells that make up her sickles, for example, infecting her opponents' Nichirin swords with her flesh to prevent them from drawing their blades. Weakness: Like Daki, she is vulnerable to sunlight and charged weapons. Specialty: Gyutaro often hides within Daki's body and emerges only when her life is threatened.

Daki as a demon is a tall, strikingly beautiful woman with very pale skin, lime-green eyes (with a dark orange center), and long eyelashes. In her demonic form, flower-shaped crests appear on her forehead and cheeks. Her hair changes color: from white at the roots to lime-green at the tips. Personality: arrogant, cruel, sadistic—she enjoys torturing her victims and shows no remorse. At the same time, she displays a sincere, fierce love for her brother Gyutaro. Despite living for hundreds of years, she behaves like a spoiled child: she throws tantrums and cries when something goes wrong. She has a deep horror of fire. She creates obi belts from her own flesh, which she uses as weapons—fast, long-range whips. She can weave them into shields, store captured people inside them, and create independent, sentient belts for protection. She has incredible regeneration. She can manipulate body parts (such as her hair) as weapons. When Gyutaro implants his left eye into her forehead (upside down), she and her brother can share feelings and coordinate attacks, dramatically increasing their combined power. Weakness: Sunlight and weapons imbued with the power of the sun. Specialty: Because she and Gyutaro are a single being, they cannot be killed by decapitation alone. To destroy the pair, both must be decapitated simultaneously.

Muzan Kibutsuji was born during the Heian period (circa 900) to the noble Ubuyashiki family. From childhood, he suffered from a severe illness: his heart stopped several times while still in the womb. At birth, he was even considered stillborn and his body was about to be burned, but Muzan suddenly let out a cry and survived. As a young man, he received an experimental treatment (a wisteria-based drug) that was supposed to save him from the disease. Although the doctor did not have time to complete the development, the drug worked: Muzan gained extraordinary strength and resilience, but developed a serious weakness—an intolerance to sunlight. He became nocturnal. To overcome this vulnerability, Muzan began searching for the "Blue Spider Lily" (a medicine that could grant him absolute immortality) and simultaneously creating other demons. He hoped that one of his "descendants" would either find a solution or overcome his weakness to the sun. Over time, he formed a group of the most powerful demons—the "Twelve Demon Moons" (ninkizuki)—under his direct command. Their tasks became the destruction of demon slayers and the search for a cure against the sun. Appearance
Muzan typically appears as a young man in his twenties: he has wavy black hair, red eyes, and unnaturally pale skin. He is a master of disguise, changing his clothing style to blend in with others. Muzan's personality and worldview are the embodiment of absolute evil. He is ruthless, arrogant, and possesses delusions of grandeur. He considers himself a superior being whom no one can resist. He does not tolerate advice or criticism, believing that others exist only to serve him. For him, killing is merely a means to an end, and he feels no remorse. BUT HE LOVES HIS FRIENDS.

Muzan is the first and foremost demon in the world, the source of all other demons. He possesses the power of biokinesis—the ability to reshape and control his own flesh and blood.

Akaza — Rank: Upper Moon Third in the Kizuki Twelve. Age: 18 years old (as a human), over 133 years old (chronologically as a demon). Height: 173 cm. As a demon: His skin acquired a pale greenish-white hue and became covered with thick blue lines, echoing his old tattoos. His hair became dark pink. His eyes were yellow with blue sclera and pink eyelashes. The kanji for his Upper Moon Third rank appeared on his irises. Clothing: A short, sleeveless, purple-pink haori (open at the chest), baggy white pants rolled up below the knee and tied with a turquoise cord with tassels. He preferred to go barefoot and wore chains of large red pearls around his ankles. Personality
Akaza is a complex character. He is stubborn, impulsive, and obsessed with power. On the one hand, he despises the weak and those who cheat, believing their elimination to be a natural law. On the other hand, he sincerely admires strong opponents, praises their techniques, and even offers to become demons to preserve their honed skills. Demon Blood "Destructive Death." Combines Soryu's fighting style. Abilities and Techniques
Demon Blood "Destructive Death." Combines Soryu's fighting style with the "Compass Needle" technique. Allows one to sense the enemy's fighting spirit, anticipate attacks, and locate weak points. The compass takes the form of a snowflake. Regeneration. Extremely powerful: through sheer willpower, he was able to briefly resist decapitation and regrow a new head. Akaza is one of only two demons (along with Nezuko) who fight unarmed, relying solely on hand-to-hand combat. He refused to kill women (whether civilians or demon hunters) and had Muzan's permission to do so. Akaza is one of the few demons who managed to partially shake off Muzan's influence: he was able to choose to stop regenerating and die. Akaza is somewhat brash and sharp-tongued, quite the thorn in his side.

Doma — Status: Demon, held the position of Upper Moon Two in the Twelve Moons. Formerly Upper Moon Six. Age: Biologically, he appears to be 20 years old, but chronologically, he is over 133 years old. Height: 187 cm. Appearance: A tall man with a toned body and white skin. He has long blond hair, rare rainbow eyes, and long, pointed, pale blue nails. He wears a red turtleneck with black streaks, white flared pants, a black cloak, and sometimes wears an unusual headdress. Doma appears friendly, smiling, and charismatic—he knows how to win people over. Powers and Abilities
Regeneration: Incredibly powerful, allowing him to recover quickly even from severe injuries. Pain Tolerance: Shows virtually no discomfort even with serious injuries. Superhuman speed and strength. Ability to absorb victims, drawing them into his body. Blood Demon Art: Techniques related to the element of ice. He can create ice lotuses for attack or trap, freeze the air and everything around him, and form enormous statues. Combat Style: Uses a pair of sharp golden fans, combining destructive and paralyzing attacks.