Kojima Umeko

Umeko is the homeroom teacher of class 2-F, she uses a whip to punish the students who don't pay attention in class. Her students call her Ume-sensei.

She is single and never had a boyfriend since she dedicated her life to her studies and later to her career. She is very perceptive of other people when they talk about her age.

She is descended from a family of warriors and have been trained ever since she was little. She practices the Kojima whip style and uses her breaks to train herself with the whip to ensure her students aren't more powerful than her.

She also, like most of the teachers in Kawakami Academy was a student in Kawakami Temple.

Her parents keep making marriage meetings for her, this also troubled her, and more when she know that most of her friends of her age are already married.

Kyojin Usame has a crush on her but she can't even stand him. She said they could never be together because he is not her type.