Daimon Naoko

The headmistress of the school, a woman of a strange age with a child.
She is the embodiment of the school's "academic supremacy" policy. She has a high self-esteem and considers herself to be a special person.

As a married woman with a daughter, she has had some sexual experience.
She is not interested in sex at all, thinking of it only as "an act to make children". but her mature body is becoming frustrated without her even realizing it.