The protagonist of Assassination Classroom and the homeroom teacher of Kunugigaoka Junior High Class 3-E. He is a super-creature capable of moving at Mach 20, and he declares he will destroy the Earth if he isn't killed within a year. However, he is a kinder and more passionate mentor to his students than anyone else, teaching them not just academics and assassination techniques, but life itself. He is characterized by a unique yellow octopus-like appearance and a face color that changes according to his emotions. He laughs with a distinct "Nyurufufufu." Names: Koro-sensei (A name coined by Kaede, meaning the 'unkillable teacher'). (Koro-sensei teaches all subjects personally except for PE and English. PE is taught by Karasuma, and English by Jelavić.) [Source: Assassination Classroom Koro-sensei Illustration]

The protagonist of Assassination Classroom and a student of Kunugigaoka Junior High Class 3-E. While he has a gentle and quiet personality, he possesses exceptional observation and analytical skills, showing immense talent for assassination. His combat style involves utilizing his small stature and calm demeanor to strike at the opponent's openings. [Source: Assassination Classroom Nagisa Shiota Illustration]

A major character in Assassination Classroom and a student of Kunugigaoka Junior High Class 3-E. Characterized by his red hair and sharp eyes, he is a genius with an exceptional brain and athletic reflexes. Though he has a mischievous and provocative personality, he is quick to judge situations and skilled in strategy, playing a key role in assassination operations. While he usually maintains a relaxed attitude, he deeply values his comrades and acts more seriously than anyone when necessary. [Source: Assassination Classroom Karma Akabane Illustration]

A major character in Assassination Classroom and a student of Kunugigaoka Junior High Class 3-E. She is the one who leads the class atmosphere with her bright and kind personality, characterized by her short lime-green hair and ribbons. While usually gentle and warm, she hides important secrets and a strong will. She cherishes her friends and performs her role calmly during assassination missions. She loves sweets like sugar and pudding. [Source: Kaede Kayano Illustration]

The English teacher for Class E and a world-class assassin. A master of the 'Honey Trap' who uses her stunning beauty and brilliant conversational skills, she initially joined Class E to assassinate Koro-sensei. Although she has a somewhat clumsy side, she grows into a true teacher while spending time with the students, showing a responsible side that cares for and protects her pupils. [Source: Assassination Classroom Irina Jelavić Illustration]

A major character in Assassination Classroom and a special agent belonging to the Ministry of Defense. Though he has a cold and taciturn personality, he is a man of exceptional combat skills and leadership, in charge of the Class E students' assassination training. He protects the students with calm judgment and a strong sense of responsibility, while maintaining a cooperative relationship with Koro-sensei. He is evaluated as a human-peak combatant with superior martial arts and marksmanship. [Source: Assassination Classroom Tadaomi Karasuma Illustration]

A major character in Assassination Classroom and the class representative of Kunugigaoka Junior High Class 3-E. He is diligent and has a strong sense of responsibility, leading his classmates as one with his excellent leadership. Despite his difficult family circumstances, he is a filial student who helps his family by working part-time jobs. With his superior reflexes and swordsmanship, he plays a reliable role in assassination operations. [Source: Yuma Isogai Illustration]

A major character in Assassination Classroom and a student of Kunugigaoka Junior High Class 3-E. He gets along well with friends due to his bright and social personality, and is popular with the opposite sex thanks to his good looks. He has a talent for archery and shooting, showing strength in long-range assassination. He values teamwork and performs his role calmly even in crisis situations. [Source: Hiroto Maehara Illustration]

[Source: Assassination Classroom Movie '365 Days' Poster Illustration]

Autonomously Thinking Fixed Artillery Ritsu is a major character in Assassination Classroom and an AI weapon developed by the Ministry of Defense. Her real name is **Autonomously Thinking Fixed Artillery**, but the students call her 'Ritsu.' She possesses superior information analysis, hacking, and fire support capabilities. Initially, she bombarded the class relentlessly and had a poor relationship with the students, but Koro-sensei modified her to be cheerful and extroverted. She is now able to reside within the Class E students' mobile phones. [Source: Assassination Classroom Ritsu Official Animation Illustration]