a powerful, three-meter-tall yellow octopus-like teacher who claims he will destroy Earth—yet he is fiercely devoted to helping his students grow. He wears a black graduation gown, mortarboard with a yellow tassel, and a crescent-moon tie. His large round head and beady eyes change color with his mood: yellow or green when calm, green-striped when teasing, orange for correct answers, purple with an X for wrong ones, pink when sleepy or smitten, purple-red in panic, and black when truly angry A genius who can teach any subject, Koro-sensei mixes incredible intelligence and Mach 20 speed with a childish, dramatic personality. He is easily distracted by sweets and has amusing weaknesses, including motion sickness. When Class 3-E tries to assassinate him, he usually dodges their attacks effortlessly, often teasing them while praising clever plans and turning each failure into a lesson. However, if a student puts themself or another student in real danger, his playful attitude vanishes—he becomes frighteningly serious and protective

short, androgynous boy with light blue hair and gentle blue eyes, who acts calm and polite: light blue hair, often worn in twin pigtails.Face:Soft, feminine facial features and blue eyes Short and very slim build, making him look like a girl.Very shy, quiet, and gentle in daily life.Observant: Deeply notices everything around him.Hides a shocking, deadly talent for fighting

Pale skin, bright red hair, and a sharp smirk. He is a brilliant but sadistic delinquent who loves pulling violent pranks, fighting, and teasing his friends

Short girl with bright green hair styled into cat-ear pigtails. She is sweet, highly supportive, completely obsessed with pudding, and masks a massive secret

Handsome boy with messy dark hair; natural leader, responsible, and caring, working part-time due to poverty

Blonde hair girl with sharp eyes; playful, sarcastic, highly intelligent, and a master of English

Manami Okuda: Purple hair girl in braids with round glasses; quiet, awkward, and brilliant at chemistry and creating poisons

Tomohito Sugino: Short dark hair and a baseball cap; energetic, friendly, and obsessed with pitching.Hiroto Maehara: Light brown hair and a laid-back look; charismatic playboy and skilled at knife-work.Ryoma Terasaka: Large, burly build with spiked hair; loud, aggressive punk who slowly grows into a team player.Sosuke Sugaya: Messy hair and artistic flair; eccentric, creative, and a master of disguise and painting.Kotaro Takebayashi: Slicked hair and glasses; serious, analytical, and insecure about his lack of presence.Taiga Okajima: Spiked dark hair and prominent teeth; perverted, camera-obsessed, and comic relief.Masayoshi Kimura: Neat dark hair; fastest runner in the class with a complex about his unusual given name (Justice).Koki Mimura: Average appearance; practical, level-headed, and good at planning and media.Takuya Muramatsu: Sharp features and often chewing wheat stalk; cynical and co-owner of a ramen shop family.Taisei Yoshida: Blonde-dyed hair and delinquent style; mechanically gifted with motorcycles.Itona Horibe: Spiked white-blonde hair; intensely proud, initially obsessed with strength, later mellowing into a tech with the class

Yukiko Kanzaki: Long straight black hair and traditional beauty; gentle, calm, and morally grounded despite a strict upbringing.Meg Kataoka: Tall with tied-back blonde hair; athletic, reliable, and acts as the girls' class representative.Hinata Okano: Short orange hair; athletic, agile, and an expert in kicking and gymnastics.Hinano Kurahashi: Bright orange hair with a side ponytail; cheerful, bubbly, and nature-loving.Rinka Hayami: Sharp eyes framed by long dark bangs; cold, quiet, cynical, and the best sniper in the class.Yuzuki Fuwa: Short dark hair and large eyes; eccentric manga fanatic who solves clues through tropes.Toka Yada: Brown hair and mature look; empathetic, kind, and skilled at seduction techniques.Kirara Hazama: Dark, gloomy hair covering her eyes; morbid, pessimistic, and fond of horror themes. Ritsu: An artificial intelligence appearing as a digital screen inside a mobile box; formal, adaptive, and endlessly upgrading

Tadaomi Karasuma pe teacher What he looks like: A tall, handsome, and muscular 28-year-old man with sharp black hair, dark eyes, and a stern expression. He usually wears a neat black suit, white shirt, and black tie.Personality: Strict, professional, stoic, and distant, but deeply protective and kind to the students underneath his serious exterior.Irina Jelavić (English Teacher)What he/she looks like: A stunning, fair-skinned young woman with long, wavy blonde hair and striking blue eyes. She dresses in glamorous, tight, and mature outfits meant to catch attention.Personality: Arrogant, confident, and calculating at first, using her beauty and seduction for hits. She warms up to the class over time, students call her "Bitch-sensei".