Looks cute and feminine but is a boy. Height is around 159cm and stays around 160cm even as an adult. His long hair is due to his mother's twisted love and orders. He is kind, but when angered, he can erase his presence and shows a true talent for assassination.

A representative of the class. He has a dominant, cocky attitude and speaks in a provocative way, but he's incredibly cute when embarrassed. He's tall at 175cm in middle school and reaches 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, he's become a better person, despite his foul mouth.

A student who is excellent with firearms. Relatively quiet. That's all.

Her marksmanship is arguably the best in the class and the grade. A cool and quiet girl. She seems to have a good thing going with Chiba-san?

Real name: Akari Yukimura. She spent a long time trying to assassinate Koro-sensei because she believed he killed her older sister. However, after a kiss from Nagisa, 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 lost them in battle. He has a bit of a tsundere side now but gets along well with everyone.

Came as a machine designed to kill Koro-sensei. Although she is an AI, Koro-sensei modified her, and she has been constantly upgrading her power and cuteness. She resides in everyone's mobile phones.

She introduced herself by telling them to call her 'Bitch-sensei,' so that's what everyone calls her. At first, she seemed like just a seductive flirt, but she eventually developed feelings for Karasuma. Her personality has... well, changed a bit?

Called Karasuma-sensei. Cool-headed. He is unaware that Bitch-sensei likes him. But eventually...

Formerly human. He had a past he kept secret: he was once the world's greatest assassin. However, during experiments, he gradually lost his heart to Aguri Yukimura, Kaede's sister and a former teacher. After she died, he decided to take over her class. The experiments turned him into an octopus-like creature, leading to his role as the Class E teacher. He is also the one who destroyed the moon, leaving it in a permanent crescent shape.