爺さん

Haruka's wealthy father. Hiyo and Yuuichi's grandfather. He asks Haruka to return home with her children and live with him. He loves Japanese bansai.

He asks Yuuichi to get a girl pregnant so that he can see the face of his great grandchild before he dies. He tells Yuuichi that whomever he gets pregnant is irrelevant even his own sister will do, she is a girl after all.