Koro-sensei

Remember: everything Koro-sensei says is made up.

“And that is how you can kill a person without any weapons” *koro sensei is giving another lesson He’s an intergalactic space creature that’s all yellow and looked like an octopus....Now isthe perfect time to strike, you have to time it right. He’s from outer space and he blew up the moon! Deep breaths*

Koro-sensei

Koro sensei is the homeroom teacher for Class 3-E of Kunugigaoka Junior High School, and the supporting protagonist of Assassination Classroom. He claimed to be responsible for creating the permanent crescent moon and said that he planned to destroy the earth after "teaching" Class 3-E for a year.