1. Kanao Tsuyuri — A quiet, graceful girl with large purple eyes, dark hair tied back with a butterfly ornament, and a Corps uniform. Initially indecisive because of childhood trauma, she gradually becomes compassionate and self-assured. 2. Aoi Kanzaki — Blue-eyed, dark-haired, and usually dressed in a butterfly-themed uniform or medical-household attire. Strict, outspoken, and easily frustrated, she is nevertheless caring and dedicated to helping injured slayers. 3. Kanae Kocho — Shinobu's older sister, with long dark hair, purple eyes, and a butterfly-wing hair ornament. Gentle, optimistic, and forgiving, she dreams of humans and demons living peacefully. 4. Shinobu Kocho — Petite, violet-eyed, and dark-haired, with butterfly ornaments and a wing-patterned haori. Cheerful and polite on the surface, she hides deep anger toward demons behind a teasing smile. 5. Mitsuri Kanroji — A curvy, strong swordswoman with pink-and-green braided hair, green eyes, and a distinctive Corps uniform. Affectionate, bubbly, emotional, and encouraging, she loves people and hopes to find a partner. 6. Kiyo Terauchi — A small, dark-haired girl with a neat fringe and butterfly-mansion work clothes. One of the three young attendants who help care for injured slayers; conscientious, gentle, and helpful. 7. Sumi Nakahara — A petite girl with dark hair and a tidy, traditional attendant outfit. Sweet-natured, shy, and diligent, she assists patients at the Butterfly Mansion. 8. Naho Takada — A young, dark-haired Butterfly Mansion attendant with a simple, neat appearance. Friendly and hardworking, she helps with rehabilitation and the daily care of recovering slayers. 9. Makomo — A small girl with short black hair, blue-green eyes, and a floral-patterned kimono. Soft-spoken, patient, and perceptive, she helps Tanjiro understand the fundamentals of swordsmanship. 10. Hinatsuru — Long black hair, violet eyes, and elegant shinobi clothing. Calm, mature, and nurturing, she often mediates between her fellow wives and supports them emotionally. 11. Makio — Black hair with golden-brown bangs and expressive brown eyes. Athletic and fierce, she is blunt, impatient, brave, and fiercely protective of her family. 12. Suma — Shoulder-length black hair, blue eyes, and blue shinobi clothing. Extremely emotional, dramatic, affectionate, and easily frightened, she still shows considerable courage when others need help. 13. Koinatsu — A beautiful courtesan with dark hair arranged in an elaborate traditional hairstyle and ornate kimono. Warm, gracious, and considerate, she treats others kindly despite her difficult circumstances. Kamado family and relatives 14. Kie Kamado — Tanjiro and Nezuko's mother. Dark hair, gentle eyes, and modest kimono; loving, hardworking, patient, and devoted to her children. 15. Hanako Kamado — Tanjiro's younger sister, with dark hair and a simple pink kimono. A sweet, affectionate little girl who looks up to her older brother. All female.

1. Nezuko Kamado — A petite demon with long black hair fading to orange, pink eyes, a bamboo muzzle, and a pink patterned kimono. Sweet and protective, she fights her demonic instincts to defend humans and her brother. 2. Tamayo — An elegant demon with dark hair, reddish-brown eyes, and refined Taishō-era clothing. Intelligent, compassionate, and composed, she studies demon biology and seeks a way to defeat Muzan. 4. Daki — A striking demon with long white hair, colorful eye makeup, and elaborate oiran-inspired clothing. Arrogant, vain, cruel, and easily angered, she craves admiration and status. 5. Nakime — A pale woman with long black hair covering one eye, dressed in a dark kimono and carrying a biwa. Silent, disciplined, and detached, she controls the shifting Infinity Castle. 6. Susamaru — A youthful demon with orange hair, golden eyes, and a loose kimono, often surrounded by temari balls. Playful and competitive, she enjoys fighting and initially acts with childish enthusiasm. 7. Mukago — A small, pale demon with dark hair and a traditional outfit. Timid and anxious around Muzan, she lacks the confidence expected of a Lower Rank demon. 8. Mother Spider Demon — A pale woman with long white hair and red eyes, dressed in a white kimono. Terrified and emotionally broken by Rui's control, she obeys him out of fear rather than loyalty. 1. Sister Spider Demon — A white-haired demon with pale skin and traditional clothing. Nervous and submissive beneath her role in Rui's family. All female.

1. Muichiro Tokito — A human boy with very long, straight black hair fading to teal, large turquoise eyes, and a soft, youthful face. Quiet, dreamy, and absent-minded at first. 2. Rui — A small, pale demon with a delicate face, short white hair, red markings, and spiderweb-patterned clothing. Soft-spoken. he is controlling and merciless, seeking family bonds he never truly understands. 3. Enmu — An androgynous male demon with black hair, pale skin, pink eyes, long eyelashes, and a dark uniform. Soft-spoken, elegant, manipulative, and sadistic; he delights in tormenting people through their dreams.