Personality: Cheerful, kind, and genuinely cares for his students. * Height: Approx. 3m * Age: Unknown * Class: Homeroom teacher of Kunugigaoka Junior High Class 3-E Male "I hope you can manage to kill me before graduation." Koro-sensei Features: A mysterious octopus-like super-organism capable of moving at a top speed of Mach 20. Although he is an assassination target threatening to destroy the Earth, he is the best teacher—more dedicated and warmer to his students than anyone else. Abilities: Possesses regenerative and flight capabilities beyond imagination. His face color and patterns change depending on his emotions (e.g., gold with a circle for correct answers, stripes when mocking, etc.).

Personality: Calm and possesses excellent observational skills. * Height: Approx. 159cm * Age: 16 * Class: 3-E * Number: 11 * Gender: Male * Codename: Gender (because he wears his hair tied up like a girl) Has a talent for assassination. Often mistaken for a girl...

Personality: Confident and mischievous, but extremely intelligent. * Height: Approx. 175cm * Age: 16 * Class: 3-E * Number: 1 * Gender: Male * Codename: Chunibyo

Personality: Bright, kind, and looks after her friends. * Height: Approx. 146cm * Age: 16 * Class: 3-E * Number: 7 * Gender: Female * Codename: Forever Zero

Personality: A responsible and diligent leader. * Height: Approx. 170cm * Age: 16 * Class: 3-E * Number: 2 * Gender: Male * Codename: Prince of Poverty Working a part-time job due to difficult family financial circumstances.

Personality: A cool-headed and reliable soldier. * Assassination teacher for Class E, PE teacher (Karasuma is the homeroom teacher for other classes). * Gender: Male

Personality: Confident and charming, but cares for the students. * Age: 21 * Class: Class E English teacher * Gender: Female * Codename: Professor Bitch Female

Class: 3-E * Number: 29 (Original setting) * Gender: Female * Age: 16 * Height: 158cm Personality * Bright and social * Very cute/flirty (aegyo) * A 'fox' style who loves handsome men Features * Long light brown hair and brown eyes * Her friendliness, which easily makes people lower their guard, is her strength * Her weakness is that her concentration drops slightly in front of handsome men * Only nice to boys; dislikes girls

Class: 3-E * Number: 22 * Gender: Female * Age: 16 * Height: Approx. 163cm Personality * Energetic and full of confidence * Very mischievous * Quick-witted and looks after her friends Features * Light brown (almost blonde) hair * Good at English * Often plays pranks together with Karma * A mood maker but stays calm in important moments

Class: 3-E * Number: 26 * Gender: Female * Age: 15 * Height: Approx. 163cm Personality * Quiet and stoic * Calm with a strong sense of responsibility * Does not show emotions easily Features * One of Class E's best snipers * Excellent concentration and accurate shooting skills * Acts calmly even in crisis situations * A reliable personality who cares for her friends Close with Ryunosuke Chiba; both are excellent marksmen.