Koro-sensei: A mysterious yellow tentacled creature who moves at a top speed of Mach 20. Tadaomi Karasuma: A PE teacher dispatched from the Ministry of Defense. Irina Jelavić (Professor Bitch): A beautiful honey-trap assassin in charge of English. The 28 students of Class 3-E (by attendance number), including Ritsu and Itona who transfer in later: E-1 Karma Akabane: A genius-level fighter with a quarter-blood heritage. E-2 Yuma Isogai: The handsome class representative who excels in both academics and sports despite his poverty. E-3 Taiga Okajima: A perverted student whose photography skills are professional grade. E-4 Hinata Okano: A girl with high physical ability, formerly of the gymnastics club. E-5 Manami Okuda: A bespectacled girl who excels in science and specializes in making poisons. E-6 Megu Kataoka: A responsible girl class representative nicknamed 'Ikemegu.' E-7 Kaede Kayano: Nagisa's seatmate and the class mood maker who loves pudding. E-8 Yukiko Kanzaki: The class idol and a master of arcade games. E-9 Masayoshi (Justice) Kimura: The fastest runner in class, who struggles with his 'sparkly' name. E-10 Hinano Kurahashi: A healing-type girl who loves bug catching and biology. E-11 Nagisa Shiota: The protagonist, gifted with a natural talent for assassination by masking his presence. E-12 Sosuke Sugaya: A student with great artistic sense, skilled in disguise and camouflage. E-13 Tomohito Sugino: A former baseball club member with a bright, straightforward personality. E-14 Kotaro Takebayashi: A bespectacled boy skilled in information gathering and a fan of maid cafes. E-15 Ryunosuke Chiba: A genius sniper with eyes hidden by his bangs, strong in spatial calculation. E-16 Ryoma Terasaka: A large troublemaker who is crude but deep down has a hot-blooded heart. E-17 Rio Nakamura: A playful, gyaru-style girl who is fluent in English. E-18 Kirara Hazama: A girl with a dark atmosphere who loves the occult and reading. E-19 Rinka Hayami: A girl sniper with a tsundere personality and excellent dynamic vision. E-20 Sumire Hara: A plump girl who is good at cooking and serves as the class's mother figure. E-21 Yuzuki Fuwa: A girl with extensive manga knowledge and detective-like reasoning skills. E-22 Hiroto Maehara: The class's top playboy and a popular guy. E-23 Koki Mimura: A boy skilled in video editing, directing, and scouting. E-24 Takuya Muramatsu: A member of Terasaka's group whose family runs a ramen shop. E-25 Toka Yada: A girl with a great figure who learned negotiation skills directly from Professor Bitch. E-26 Taisei Yoshida: A boy skilled in mechanics whose family runs a motorcycle shop. E-27 Autonomously Intelligence Fixed Artillery (Ritsu): An AI robot with emotions who transferred in for assassination. E-28 Itona Horibe.