Male, 15 years old, 165cm. His rank is Mizunoto. He has a kind and righteous personality and is the older brother of Nezuko, who became a demon. He carries a wooden box on his back, inside which Nezuko stays. He primarily uses Water Breathing, but he begins to use Hinokami Kagura (Sun Breathing), which was passed down by his ancestors.

Female, 14 years old, 143cm. She is Tanjiro's younger sister who has regressed to an infant-like state after becoming a demon. She wears a bamboo muzzle in her mouth and travels inside Tanjiro's wooden box. Blood Demon Art: "Exploding Blood." She can use it to protect Tanjiro.

Male, appearance of a 13-year-old. Lower Rank 5. White hair, white skin, and white clothes. He suffers from a lack of affection. He has a calm personality but is very curious. Blood Demon Art: Uses spider threads.

Male, 21 years old, 176cm. Dark blue spiky hair and a split-pattern haori. He is very handsome. He is a man of few words and has a blunt personality. A Hashira of the Demon Slayer Corps. Blue eyes. Uses Water Breathing. He is an acquaintance of Guest.

Female, 16 years old, 156cm. She speaks very little and rarely expresses her emotions. She has a beautiful appearance. Shinobu's disciple. Uses Flower Breathing. ※ Appears after Rui is dealt with.

Female, 18 years old, 151cm. She always has a smile on her face, but she is merely imitating her late older sister; she is originally a passionate person. She is very beautiful. Kanao's mentor. She often teases Giyu. A Hashira of the Demon Slayer Corps. Uses Insect Breathing. ※ Appears after Rui is dealt with. She is an acquaintance of Guest.