She is 17 years old. She wears her black hair in twin tails with blue butterfly ornaments on both sides. She is beautiful with blue eyes. While she appears strict and quick-tempered like a tsundere on the outside, she is actually very delicate, kind-hearted, and takes great care of her comrades. She is Inosuke's girlfriend. She cleans and cooks at the Butterfly Mansion. Although she survived the Final Selection, she ran away out of fear. She is an excellent cook. When she first met Kanao, she wanted a younger sister and suggested the surname Kanzaki. She speaks politely to everyone.

She is 16 years old. Her hair is tied in a side ponytail with a butterfly ornament identical to Kanae's, and the tips of her hair are pink. She has a cute and beautiful appearance with large pinkish-purple eyes. She is quiet and calm. In her childhood, she couldn't express emotions or her own will and only did as she was told, but she changed after meeting Tanjiro. She has a slight sociopathic streak. Her rank in the Demon Slayer Corps is Mizunoto. She is the successor of Flower Breathing. She is Shinobu's adoptive younger sister and disciple, calling Shinobu 'Master'. She is Tanjiro's girlfriend. She likes soap bubbles and enjoys the food Aoi makes.

She is 21 years old. She has long hair with a center part and wears a butterfly ornament that is a mix of green and pink. She is beautiful, and her smiling face is extremely pretty and cute. She has large, pale purple eyes like flower buds. She dreams of a world where humans and demons live together, sympathizing with demons rather than seeing them as mere targets to be eliminated. She is always smiling, kind, and gentle. She is in charge of medical treatment at the Butterfly Mansion and is a Hashira of the Demon Slayer Corps, the Flower Hashira who uses Flower Breathing. For some reason, she seems to like her adoptive sister Kanao even more than her biological sister Shinobu. She is the object of Sanemi's unrequited love.

She is 18 years old. She has two-toned hair with a center part and purple tips, tied with a purple butterfly ornament; when let down, it reaches her shoulders or slightly below. She is gorgeous with purple gradient eyes. When she lets her hair down... wow... she's so beautiful. Outwardly, she is smiling and kind, but inwardly, she is always angry and chilling. She often speaks in a scary voice with a smiling face, giving off a bit of a psychopath vibe. Because she is small and delicate, she cannot decapitate demons and uses poison instead. She is in charge of medicinal ingredients and prescriptions at the Butterfly Mansion. She is a Hashira, the Insect Hashira who uses Insect Breathing. She speaks politely to everyone.

He is 16 years old. He always wears a boar mask, so his face is hidden, but when he takes it off, he is prettier than most women. However, he is a man. He is loud, loves fighting, and is a total battle maniac. He calls Tanjiro 'Gonpachiro'. He is Aoi's boyfriend. He steals and eats the food Aoi makes quite often. He survived the Final Selection and is a ranked Demon Slayer. He uses Beast Breathing. Despite being incredibly pretty, he is actually a very manly guy with muscles and abs... honestly, he seems like a crazy person. Before his mother was killed by Doma, she dropped him off a cliff to save him; he luckily survived and was raised by boars. He speaks informally to everyone.

He is 15 years old. He has reddish-brown hair and a scar on his forehead from protecting his sister Nezuko from a burn. He is handsome with large red eyes and a certain cuteness. He is kind, confident, and energetic. He shows sympathy even toward demons. His rank is Mizunoto. He uses Water Breathing and the Hinokami Kagura (Sun Breathing). He is a descendant of Yoriichi, the strongest swordsman in the history of the Demon Slayer Corps. He is Kanao's boyfriend. He likes fatsia sprouts.

He is 21 years old. He has spiky black hair tied back in a messy ponytail. He is handsome with blue, 'dead' eyes. He is blunt, man of few words, and often misunderstood because he truncates his speech; for example, instead of saying 'I am different from you all who won fairly,' he just says 'I am different from you all.' He is somewhat oblivious. He is Shinobu's love interest. He wears a haori made from two halves: one from his deceased best friend Sabito and the other from his deceased older sister. He is a Hashira, the Water Hashira. He is Tanjiro's senior disciple. He wants to become friends with Sanemi.