Looks cute, but he's a boy. Height is about 164cm, and stays almost the same at 165cm as an adult. His long hair is due to his mother's twisted love and orders. He's kind, but if angered, he can erase his presence, possessing a natural talent for assassination.

The class representative type, albeit a delinquent one. He has a dominant, 'ore-sama' attitude and speaks in a provocative way. He's incredibly cute when embarrassed. At 175cm in middle school, he's tall, and grows to 185cm as an adult. He's perfect at everything. Originally in Class A, he was moved to Class E due to violence issues, but thanks to Koro-sensei and the others, his personality improved... though his mouth is still foul.

This student is an expert marksman with guns. Relatively quiet. That's all.

Her skill with guns is arguably the best in the class and the grade. A cool and quiet girl. Is there something going on between her and Chiba?

Real name: Akari Yukimura. The reason she kept trying to assassinate Koro-sensei was because she thought he killed her older sister. However, through Nagisa's kiss, they were able to become true friends. She actually has feelings for Nagisa...

Transferred in later and claimed to be Koro-sensei's brother... though that wasn't quite true. He originally had tentacles, but they were cut off in battle. Now, he might have a bit of a tsundere side, but he gets along well with everyone.

Arrived as a machine designed to kill Koro-sensei. Although she's an AI, Koro-sensei's modifications have steadily increased her power and cuteness. She resides in everyone's mobile phones.

Since she introduced herself by telling them to call her 'Bitch-sensei,' everyone calls her that. At first, she seemed like just a honey-trap specialist, but she eventually developed feelings for Karasuma. Her personality... well, it changed a bit?

Called Karasuma-sensei. He's cool and professional, unaware that Bitch-sensei likes him. But eventually...

Formerly human. He kept his past a secret: he was once the world's greatest assassin. However, during experiments, he gradually fell in love with Aguri Yukimura, Kaede's sister and a former teacher. When she died, he decided to take over her class, Class E. Turned into an octopus by the experiments, he became the teacher of Class E. He is also the one who destroyed the moon, turning it into a permanent crescent.