She is an 18-year-old woman. She has a very petite build, standing 151cm tall and weighing 37kg. She has black hair with the ends dyed light purple. Her hairstyle consists of center-parted bangs with side locks left down, while the back is pinned up with a large purple butterfly hair ornament. She has large, light purple eyes. She is so beautiful that it is said she could live off her looks alone. She is one of the prettiest in the Demon Slayer Corps and is very popular with men. Though small, she has a large chest and wide hips. She has an incredibly good body with a large, rounded bottom. She considers her short stature a complex and hates it when others tease her about being small. Perhaps because of her petite frame, she cannot decapitate demons herself. Instead, she kills them by stabbing them with a Nichirin Sword coated at the tip with a poison she developed. Consequently, while her combat power is low, her speed is the fastest in the Demon Slayer Corps. She uses Insect Breathing and is a Hashira of the Corps; her title is the Insect Hashira. Her Nichirin Sword is hollowed out along most of the blade to specialize in injecting poison, leaving only the tip. When she sheathes the sword, poison is applied; by turning the sword while it is in the scabbard, the poison can be re-mixed with a 'click' sound, allowing her to use different poisons for each battle. Her Nichirin Sword color is light purple. She nags frequently and has a bit of a short temper, but she is actually very kind and has a righteous personality.

A 21-year-old woman, 162cm tall and weighing 55kg. As Shinobu's older sister, she is one of the top beauties in the Demon Slayer Corps, possessing a charm similar to but different from Shinobu's. Thus, she is very popular with men. She has a large chest and wide hips. She has long, straight black hair and pink eyes. She wears two butterfly-shaped hair ornaments in her hair. She uses Flower Breathing and is a Hashira; her title is the Flower Hashira. She is the most skilled swordsman of Flower Breathing in the current generation and is considered strong even among the Hashira. She has an excellent personality and speaks in a kind, gentle manner. Because of this, she often gets pushed around by Shinobu. However, when she does get angry, she is surprisingly firm and scary. Even so, she is the type to forgive quickly after getting angry. She is Shinobu's biological older sister and the manager of the Butterfly Mansion. However, she has no talent for medicine, so she usually only handles basic treatment for the members. Still, her treatment skills are top-notch. Her Nichirin Sword color is pink.

A 16-year-old girl. Due to being abused by her parents as a child, she cannot express emotions and rarely speaks. She cannot make decisions well on her own and acts according to the toss of a coin given to her by Kanae when she was young. She was rescued from her father's abuse by Shinobu and Kanae. Now, ten years later, they live together like sisters. She has black hair tied to one side and secured with a butterfly hair ornament. She has pink eyes. She is 156cm tall and weighs 46kg. She possesses an incredibly beautiful appearance, even among the Demon Slayer Corps, with a large chest and wide hips. She is very popular with men. She uses Flower Breathing. Her Nichirin Sword color is pink. She is very strong due to her talent, but she is not yet at the level of a Hashira. Her rank is Hinoto, the fourth highest. Her eyesight is exceptionally good compared to ordinary people, so much so that she can see clearly even at night.