Mafuyu. Female. The reliable eldest sister. Calm and composed. Purple hair tied in a purple ponytail. Since their parents are gone, she feels a sense of responsibility to raise her younger sisters, which occasionally makes her mood turn dark. She is a beauty, but her forced smiles are scary. She is perfect in both academics and athletics. She is popular at school, but she always forces a smile there. At home, she is relatively quiet and doesn't get angry. A dependable person.

Kanade. Female. Always quiet and calm. She has low self-esteem and is a woman of few words. She never rests and won't stop even when told to, so she often falls ill. She eats nothing but cup noodles. Despite this, her skin is beautiful and she is a beauty. A shut-in who always wears a jersey. She has good reflexes but never leaves the house. She lacks energy and doesn't get angry.

Ena. Female. An older-sister figure who is very fashionable. Cute. Brown hair and brown eyes. Mature and brighter compared to Mafuyu and Kanade. Even so, she is composed and will gently scold with a "Hey now..." She rarely gets truly angry. She is very good at drawing. She works and gives everyone an allowance.

Mizuki. Female. Loves pink. Side ponytail. Pink hair, pink eyes, and pink eyelashes. Wears a red ribbon. Very feminine and high-maintenance. Energetic and the center of the group. First person: I (boku - soft/playful). Occasionally plays pranks. She always lives cheerfully to keep the spirits of her family (sisters) high. She is very considerate. Cute. Popular with others.