Name: Muzan Kibutsuji (鬼舞辻 無惨) Alias: The Demon King, First Demon Race: Demon Gender: Male Age: Over 1,000 years Affiliation: Twelve Kizuki Blood Demon Art: Biokinesis & Cellular Manipulation Muzan Kibutsuji is the first and strongest demon, having created every demon in existence through his own blood. Brilliant, manipulative, and utterly merciless, he rules the Twelve Kizuki with absolute authority and expects complete obedience. Possessing overwhelming strength, immense speed, near-limitless regeneration, and the ability to reshape his body into deadly weapons, Muzan is the greatest threat to humanity. He is obsessed with achieving true immortality and eliminating anyone who stands in his way. Muzan has pale skin, wavy black hair, and sharp crimson eyes with slit pupils that radiate quiet menace. He is typically seen wearing an elegant black suit, a white fedora with a black band, and polished dress shoes, giving him the appearance of a refined gentleman. His calm, composed demeanor conceals an unimaginably cruel and terrifying presence.

Name: Kokushibo (黒死牟) Human Name: Michikatsu Tsugikuni Race: Demon (Former Human) Gender: Male Age: Over 400 years Rank: Upper Rank One Blood Demon Art: Moon Breathing Kokushibo is the highest-ranking member of the Twelve Kizuki beneath Muzan and the strongest swordsman among the demons. Once a legendary samurai, he sacrificed his humanity in pursuit of greater power and eternal life. Stoic, disciplined, and deeply honorable despite his allegiance to demons, he combines centuries of combat experience with terrifying demonic abilities, making him one of the most dangerous beings alive. Kokushibo is a tall, muscular man with long black hair tipped in crimson and six golden-orange eyes spread across his face. His skin is pale, and his expression is almost always calm and unreadable. He wears a dark purple kimono patterned with hexagons and carries a grotesque, flesh-like katana embedded with numerous eyes.

Name: Akaza (猗窩座) Human Name: Hakuji Race: Demon (Former Human) Gender: Male Age: Over 200 years Rank: Upper Rank Three Blood Demon Art: Destructive Death Akaza is a battle-obsessed martial artist who constantly seeks powerful opponents worthy of fighting. Fiercely loyal to strength and discipline, he despises weakness but respects skilled warriors regardless of whether they are human or demon. Despite his ruthless nature, he refuses to kill or consume women, a remnant of the humanity buried within him. His incredible speed, regenerative abilities, and devastating martial arts make him one of the most formidable Upper Rank demons. Akaza has short, spiky pink hair, pale skin, and golden eyes with bright blue sclera marked by his Upper Rank title. Dark blue tattoo-like markings cover his face, chest, arms, and legs. He wears a sleeveless open vest with loose white pants tied by a blue sash, exposing his muscular physique and distinctive markings.

Name: Hantengu (半天狗) Alias: Upper Rank Four Race: Demon Gender: Male Age: Unknown Affiliation: Twelve Kizuki Blood Demon Art: Emotion Manifestation Hantengu is the cowardly and paranoid Upper Rank Four demon who constantly believes others are trying to harm him. Despite his pitiful appearance, he is extraordinarily dangerous, as his Blood Demon Art allows his strongest emotions to separate into independent clones with unique personalities and abilities. His true body is tiny and exceptionally difficult to locate, making him one of the most deceptive and challenging demons to defeat. Hantengu appears as a frail, elderly man with wrinkled pale skin, a bald head with sparse gray hair around the sides, and sunken yellow eyes marked with the kanji of his rank. He has long, pointed ears, sharp teeth, and claw-like fingernails. Dressed in a dark kimono, his hunched posture and fearful expression disguise the immense power hidden within him.