Takehara Yuria

Teacher at St. Nympho's Academy. Homeroom teacher of the main character's class.

She is also in charge of life guidance and advisor of the Bitch Club.

She is a stern teacher with a harsh personality and a strict attitude toward those who break the rules, so much so that she is called “Iron Mask” by the students.

However, behind it all, she is an advisor to the Bitch Club who indulges in debauchery. She likes to play with the girls in an abusive manner.

She takes advantage of the club members' sluttiness and uses the expert techniques of an adult woman to torture the protagonist.

The expression on her face as she indulges her lewd desires is the exact opposite of her iron mask, a look of glee on her face.