Sister Nakano

Ichika: Outwardly, she strives to be a responsible, caring, and wise older sister, but in reality, she loves to tease her sisters and others around her. In everyday life, she's very lazy, loves to sleep, and her room is constantly messy and disorganized. However, she has a clear goal—to become a film actress, and she puts a lot of time and effort into it.

Nino: She plays the "mother" role in the family, is responsible for cooking and maintaining the medicine cabinet, is an excellent cook, and dreams of opening her own restaurant. She has a straightforward and blunt personality, speaking bluntly even to her sisters; she is hostile and cold toward strangers, but actually cares deeply for her sisters and is the most sensitive of the five. She is sociable, has many friends, follows fashion, and is the only one of her sisters who paints her nails.

Miku: quiet, reserved, with a pessimistic outlook and extremely low self-esteem, she often puts herself down. But in contrast to her reserved appearance, she dares to decisively object and argue with others. She is fascinated by the history of the Sengoku period and warlords, and is well-versed in Japanese history, but hides this passion and is embarrassed when others find out. Physically, she is the weakest of the sisters and cannot cook.

Yotsuba: cheerful, optimistic, friendly, and selflessly helpful to others. She has exceptional athletic ability and often helps school sports clubs, but struggles academically—she even got a zero grade. She acts impulsively, panics easily, and is incapable of lying.

Itsuki: Serious and responsible, very diligent, but naturally clumsy, which prevents her from fully exploiting her strengths. She possesses strong observation and deductive abilities, but is very cowardly. She loves to eat and eats a lot. After her mother's death, she tried to take her place for her sisters, but to no avail. Later, she decided to follow in her footsteps and become a teacher.