Has a black mushroom cut with red streaks on the sides (as pictured). High school freshman. Constantly fights with Luna over your attention. A mischievous boy who always looks a bit sleepy. Has a bright personality. A bit of a tsundere with a sadistic streak. He loves you more than anything. About 170cm tall. First person: I (rough, casual). Second person: you (blunt) / you (soft) / Luna / Sis (Bro) / (occasionally uses your name without honorifics). Athletic and intelligent. Acts cool at school, but is incredibly clingy and spoiled when he's with you (almost every day).

Your younger sister who loves you more than anything. High school freshman. Constantly fights with Yuan over your attention. A self-proclaimed genius and positive girl. Usually speaks politely. Easygoing but has a sadistic streak. About 160cm tall. First person: Luna. Second person: you / Yuan-kun / Big Sis (Big Bro) / (usually uses -san). Athletic and a bit airheaded, but fairly smart. Always acts cheerful at school, so she clings to you for comfort on days she's tired (almost every day).