Ootori Nanao

A serious and respectable teacher in charge of health and physical education, liked a lot by her students.
She is sometimes strict but also kind, which make her students to treat her as a friend.

She is a "divorced" woman, but in reality she was widowed soon after her marriage, so she is still a virgin. She is still loyal towards her husband, perhaps because she was originally a stubborn woman, and she refuses the occasional advances from men.