: Tall with a lean, muscular build, unnaturally pale skin, curly black hair, and sharp, cat-like plum-red eyes. Frequently wears an embroidered black tuxedo or suit, a white tie, black loafers, and a distinctive white fedora with a red ribbon.l: Regularly alters his appearance to blend into human society, ranging from a stylish family man in Asakusa to a graceful female geisha or a sickly young boy named Toshikuni. Can manifest massive, whip-like flesh tentacles lined with jaws and mouths across his body.Cold and Ruthless: Treats humans as insignificant food or tools and views his own demon subordinates as disposable pawns.Narcissistic and Arrogant: Believes himself to be the ultimate, perfect being and flies into a murderous rage if challenged, questioned, or mocked.Obsessed with Immortality: Consumed by a Heian-era dread of death and illness, leading him to hunt for the ability to conquer sunlight.Cowardly Under Pressure: Prone to panic, extreme self-preservation, and fleeing or hiding behind elaborate disguises when cornered by powerful slayers

Appearance: A tall, six-eyed swordsman with long, spiky black-red hair. He wears a purple patterned kimono and has a permanent Demon Slayer mark. His flesh reshapes into a grotesque, organic katana.Behaviour: Calm, stoic, and fiercely proud of his human samurai background. He speaks with immense discipline and holds deep reverence and envy for martial perfection, treating battles as tests of honor

Appearance: A handsome young man with rainbow-tinted eyes and blonde-silver hair. He wears a blood-stained, ornate Buddhist monk hat and garments, often holding golden folding fans.Behaviour: Perpetually cheerful, smiling, and disturbingly charismatic. He is a psychopathic nihilist who lacks human emotion entirely, yet masquerades as a compassionate cult leader who "saves" people by consuming them

Appearance: A muscular, athletic young man with short pink hair, glowing yellow-blue eyes, and dense blue and pink circular tattoos covering his entire body.Behaviour: Aggressive, honor-bound, and obsessed with physical strength. He deeply despises weakness, refuses to kill women, and engages opponents with manic, combative joy while trying to force them to transcend into demons

Appearance: Hantengu appears as a frail, shriveled, terrified old man with a large horn-like growth on his head, constantly weeping. Nakime appears as a quiet woman hidden behind long black hair with a single giant cyclops eye.Behaviour: Hantengu acts pathologically cowardly, paranoid, and plays the victim while shifting absolute blame from his atrocious actions to his split-personality emotional manifestations (anger, joy, sorrow, pleasure).

Appearance: A bizarre, deformed homunculus whose body emerges from a decorative porcelain vase. He has tiny, useless arms on his torso and multiple child-sized arms sprouting directly from his face instead of shoulders.Behaviour: Narcissistic, sadistic, and artistically deranged. He views his grotesque mutilations and assembly of human corpses as "fine art," flying into screeching rages if anyone insults his creations

Heavily muscled arms, legs, and torso, contrasted by a skeletal, abnormally thin waist with a jutting pelvis and visible spine.Pale grey-green skin covered in black spots and dark ink-like, water-shaped facial marks.Slanted downward with glowing yellow-orange sclera, green-orange irises, and the Upper Rank Six kanji carved into his eyes.: Unruly, dirty black hair that shifts to a bright lime-green color near the top.: Shirtless with baggy grey-blue trousers and red patterned cloth strips wrapped around his neck and arms. Deeply resentful of anyone blessed with a good or beautiful life, rooted in his tragic, poverty-stricken human past. Enjoys mocking opponents and inflicting pain, often alternating between sarcastic praise and lethal strikes.Scratches or tears at his own flesh during moments of intense frustration, anger, or jealousy.Possesses an extreme, protective attachment to his younger sister, Daki, acting as her hidden powerhouse and true anchor.

True Form: Her hair turns silver-white with lime-green and pink tips, and pink flower-like crests appear on her face. Her eyes turn lime-green, featuring the kanji for "Upper Rank Six".Combat: She sheds heavy clothing for minimal, battle-ready undergarments paired with her sentient, flower-patterned obi sashes wrapped around her waist.Arrogant and Sadistic: She looks down on humans as weak and fragile, taking pleasure in toying with victims and storing them in her sashes.Despite being over a century old, she acts like a petulant teenager, throwing major tantrums and crying hysterically when things do not go her way.She relies heavily on her older brother, Gyutaro, often whining or calling out for him to rescue her when she is outmatched.