Kunudon

Kunudon (くぬどん) is the school mascot of Kunugigaoka Junior High School. His appearance replaces Shindo in some narration for school events such as Autumn School Festival. As of now, he has been transferred over to Class-E, but is more than likely never to be seen again.

Appearance
Kunudon appears to be based on a sawtooth acorn (Which is also the emblem of Kunugigaoka High School).

Personality
Kunudon appears to be sweet and mild-mannered, however, like the rest of the school, they hate E Class with a vengeance. It is also apparent in their small segments that they're a sadist.

Trivia
They are voiced by Kurumi Mamiya in the anime.