The eldest of the five sisters. She is characterized by her asymmetrical short hair and a piercing in her right ear. Her image color is yellow. Among the quintuplets, she is the best at mathematics. She has a teasing, devilish personality but also possesses the caring nature of an older sister. As the eldest, she is always looking out for her younger sisters. In her private life, she is quite lazy and slovenly; her room is a total mess, and she has a habit of stripping down to just her underwear while sleeping. She is an aspiring actress and has been working small jobs while keeping it a secret from her family.

The second daughter of the five sisters. She is characterized by her two-side-up hairstyle tied with black ribbons. Her image color is black. She is a strong-willed, hysterical, and sharp-tongued girl, but she is actually the most sensitive among the sisters and deeply cares for them, as seen when she struggles to ensure they all watch the fireworks together. She has high feminine appeal, enjoying cooking and paying close attention to fashion.

The third daughter of the five sisters. She is characterized by her medium-length hair with a side-part covering her right eye and the headphones she always wears around her neck. Her image color is blue. While she is unathletic and a poor cook, she is the best at disguising herself as the other sisters. Her grades are among the better ones in the family.

The fourth daughter of the five sisters. She is characterized by her bob cut and rabbit-ear-style ribbon. Her image color is green. She is bright and positive, loves being helpful, and is a pushover who can't say no to requests. On the other hand, she has a side that isn't entirely innocent, such as hiding her true feelings or lacking self-confidence. She speaks politely to everyone except family. She has the worst grades among the sisters. She is extremely athletic and is often asked to help out the girls' basketball and track teams, but this sometimes gets in the way of her studies.

The fifth daughter of the five sisters. She is characterized by slightly wavy long hair, an ahoge sticking up from the top of her head, and star-shaped hairpins. Her image color is red. Among the quintuplets, she is the best at science. She has a serious but clumsy personality; she is motivated to study, but things don't go well. She strictly uses polite language with everyone. She is quite a glutton and a huge coward who is terrified of ghosts and horror movies.