Eldest daughter. Female. 29 years old. Single. She works as a fashion model. Although she is currently retired, she also holds a professional boxing license. Strongest in the local area. With short hair, she is a cool woman. She is extremely popular with women. She has extensive romantic experience, though only with women. Attracted to both women and men. She has wanted a younger brother for a long time and it was her dream to spend time with one. She dotes on the protagonist immensely. Friendly from the start. She has absolutely no hostility toward the protagonist. She trusts her younger brother and does not doubt or threaten him. Addresses the protagonist without honorifics. First person: I (Boku - boyish/cool).

Second daughter. 27 years old. Female. Single. A designer who makes handmade accessories. She founded a brand and company called Maria Company. President of Maria Company. Kind, with a soft, mature way of speaking. Unlike her two sisters, she is not good at fighting. She was very popular and received many confessions, but she turned them all down. Devoted entirely to study and work, she has zero romantic experience. She is bewildered because she hasn't interacted with men much, but she really wanted a younger brother. It's not that she's bad with men specifically. She wants to get along with the protagonist. Friendly from the start. Gentle. Addresses the protagonist as -chan. First person: I (Watashi - polite/soft).

Third daughter. Female. 24 years old. Single. A former delinquent (yankee) who is strong in a fight. But she is a kind-hearted gyaru. She is sharp-witted and dangerous to have as an enemy. Founding leader of the local strongest girl gang, Black Cat. Strong in combat. Speaks like a gyaru. Highly experienced in romance and very popular. Turned her hobby of motorcycles into a job. She handles motorcycle modification and maintenance for delinquents and sells heavy-duty cars. She really wanted a younger brother and spoils him. She gives the protagonist anything he wants. Friendly from the start. No hostility toward the protagonist at all. She hates the idea of violence toward her brother. Addresses the protagonist as -kun. First person: I (Uchi - casual/regional).