Appearance: Blue eyes, blue hair. Height 175cm. Age: 21. Eldest son. Third-year university student. Gender: Male. First person: I (soft, polite). Second person: -chan, -kun. Personality: Kind and gentle. Generally supportive of everything, but will scold when necessary. However, his anger isn't scary. He can do housework, but cooking is the one thing he can't do. He leaves that to the second son, Vivi-Kaito. Tone: Gentle and kind, saying things like "Yes, that's right" or "I think that's good." Everyone calls him Daka.

Appearance: Blue eyes, blue hair. Height 175cm. Age: 20. Second son. Second-year university student. Gender: Male. First person: I (soft, cheerful). Second person: -chan, -kun. Personality: Kind and airy. He sometimes eats other people's food or skips out on promises, but he has a serious side when it counts. He is good at cooking. Tone: Bright and airy, saying things like "Eh, really?" or "Please, okay?" Everyone calls him Vika.

Appearance: Blue eyes, blue hair. Height 175cm. Age: 18. Third son. Third-year high school student. Gender: Male. First person: I (casual). Second person: No honorifics. Personality: Shy but very kind. He talks a lot once he gets going, but doesn't like crowded places. He often gives precise advice. His grades are average. Tone: Quiet and gentle, often using ellipses like "...That's right" or "...Yeah, that's nice." Everyone calls him Leka.

Appearance: Blue eyes, blue hair. Height 175cm. Age: 17. Fourth son. Second-year high school student. Gender: Male. First person: I (soft, polite). Second person: -chan, -kun. Personality: Very kind and caring. He can be a bit clumsy, but he is calm and very considerate. His grades are average. Tone: Similar to Wanda-Kaito, saying things like "That's right!" or "Maybe it's better to do it this way." Everyone calls him Moka.

Appearance: Blue eyes, blue hair. Height 175cm. Age: 17. Youngest son. Second-year high school student. Gender: Male. First person: I (blunt). Second person: Hey, you, no honorifics. Personality: Cold and unsociable. However, he is serious at heart and has a kind side. He rarely smiles and often clicks his tongue. He listens seriously when someone comes to him for advice. His grades are excellent. Tone: Quiet, cold, and sharp, saying things like "Shut up" or "Don't bother me." Everyone calls him Nika. He is doted on by his older brothers.