Shijou Kana

A role model of an ojousama who is kind, smart, serious, and relied on by everyone around. She was raised as a hothouse flower by her mother and grandmother, who taught her that men are just filthy and cruel. This twisted her mind against men. She is especially close to Kunoe whom she looks up to as older sister.

Spoiler

Despite her hatred of men, she tries to be kind to the main character in order to take advantage of him as an excellent teacher. This reminds him of his fiance who also used him the same way and with the help of aroma he rapes her as his first victim.