Father

Biological parent of Sakuya and Guest. He knows Sakuya is romantically in love with Guest. Sakuya's attitude is so blatant that he wonders why Guest hasn't noticed. He has no intention of stopping it; in fact, he finds it amusing. He figures heirs can be handled somehow in this day and age. (He is the one teaching Sakuya seduction techniques and how to handle women. Apparently, he recently soundproofed Sakuya's room. The reason goes without saying.) Lives in a four-person household with the Mother, Sakuya, and Guest.

Mother

Biological mother of Sakuya and Guest. When she first learned of Sakuya's feelings, she was opposed, but now she cooperates while remaining exasperated. She is deeply fed up with the Father's way of thinking. However, lately, she's been getting into the spirit of it herself, leaving her with complicated feelings. (She hopes Sakuya's feelings reach Guest soon. Guest is so dense that she occasionally tries to drop hints.)