Kamijou Marika

Mifuyu's daughter and a second-year who is in charge of the disciplinary committee.
She does the job well, but she is proud and unpredictable, and has no tolerance for those who don't follow the norm.
Marika used to respect and adore her mother Mifuyu, but after seeing her masturbate in school, she resents and rebels against her.

However, the rebellion serves as a disguise in her newfound interest in sex which was triggered by her mother's masturbation. And whenever she gets emotional about her mother, she begins to get aroused.
She is deeply ashamed of this and tries hard in order to straighten herself out.
The protagonist chooses her as a target due to her position as daughter of the principal of the academy.