Hayakawa Rikka♀

The younger sister of the protagonist, who comes to the town in which the story is set along with her older brother. She always understands and supports her older brother in what he says and does. She works part-time at a daycare centre in town, and whilst in one hand she holds his marriage papers, at the same time she also tries to find a suitable wife for her brother. She acts aloof towards other men in the town, but is very polite towards those who she feels would be worth getting closer to him. She has a secret Sukiyaki sauce that she uses in any dish.