Shoji Kubodera

He is the homeroom teacher of 9th Grade Class 3 at Yomiyama North Middle School.

Personality
He seems very content on everyone keeping the class rules top priority. He is seen loosing his mind under the frustration of the class' curse, when the countermeasures didn't work.

Appearance
He has black hair and wear spectacle. In the anime, he looks a bit young whereas in the manga, he looks kind of old.

Plot
Kubodera is rarely seen except for when the class starts, where he is there for homeroom. In episode 6, he is seen coming to class in a messed-up state and procedes to take out a knife, and apologizes to everyone.