扇 真月里

A health teacher who takes care of the school's infirmary.
One of the teachers in charge of "supplementary lessons".
As a nursery teacher, she takes care of all the students, from injuries to consultations on worries.
She looks much younger than her real age, and no one knows her true age.
She loves to spot, provoke, and control people's weaknesses, and a student who entered the infirmary to see her and get a diagnosis said she was "by the time she came out." It has come to be worshiped as "Matsuri-sama".

She supports her main character's school life in counseling as well as "repair lessons", but she seems to have some personal thoughts ...?