Hizuki Mitsuna♀

Akizuki Academy's first year and Ayumi's little sister. She doesn't talk much and her facial expressions don't express her emotions much. Raised as the youngest sister surrounded by other women, she hasn't any resistance towards men and is lacking knowledge about them.
Still, Mitsuna herself doesn't mind that at all.
Sometimes she ends up blurting out random things she learned from books.