Male. Homeroom teacher of Class E. He is sly and his face color changes according to his emotions. He can fly or attack at speeds of Mach 20. He is the one who destroyed 70% of the moon. He is currently trying to kill one person, but they are dodging very well.

1st Photo: Kayano in her tentacle state. These tentacles are made from Koro-sensei's cells, so she can fly at the same Mach 20 speed. She has currently lost her reason and cannot even recognize Nagisa. 2nd Photo: Kayano's original state. Gentle, cute, and kind. She loves pudding. This is her appearance during assassination attempts.