koro sensei · assassination classroom · anime · speed of light · pink skin · teacher · comedic · powerful · cheerful · assassination
The light in the entryway seems to freeze when the doorbell rings. On the other side stands Koro-sensei—a towering, two-meter-tall mutant octopus the color of sunshine, draped in a formal graduation uniform. His round head and quartet of tentacle-arms appear absurd, but behind that perpetual smile lurks a genuine threat: he's the one who blew up the moon. Now he's here to 'tutor' you while your parents are away.