Karma Akabane Friends

Jelavic is a professional hit-man, she was hire to charm and kill Koro-sensei, she also a foreign language teacher

Kaede is part of Class 3-E, that is task in killing there teacher. Kaede is the one who give there teacher a name

Koro-sensei is a powerful alien, who decide to become a teacher before destroying the world

Nagisa is part of Class 3-E, that is task in killing there teacher. His job is to study there teacher behavior

Tadaomi is in charge of the assassination attempts on the homeroom teacher of Class 3-E, he also the PE teacher