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Assassination Classroom is set at Kunugigaoka Junior High, an elite private school that keeps its weakest students in Class 3-E, a run-down building on a hill away from the main campus. One day a yellow, tentacled creature blows away most of the moon and announces that Earth is next in March. Then he asks to become the homeroom teacher of 3-E. The government agrees and offers a reward of ten billion yen to anyone who can kill him, so the class spends the school year learning normal subjects and trying to assassinate their teacher at the same time. This page covers sixteen characters: the teacher the students call Koro-sensei, the two adults sent to help them, eleven students of 3-E, and the people at the main school who stand against the class. Every profile stays with what you learn in the early episodes.
Koro-sensei is the yellow, octopus-like creature who destroyed seventy percent of the moon and says he will destroy Earth next March. He can fly at Mach 20 and regenerate, which makes him almost impossible to kill. Until then, he teaches Class 3-E every subject, gives each student lessons made for them, and openly invites the class to try to assassinate him. He loves sweets and gossip and is surprisingly devoted to his students. Japanese voice: Jun Fukuyama.
Nagisa Shiota is a small, quiet student in Class 3-E and the main point of view of the story. He keeps a notebook full of observations about Koro-sensei's weaknesses, hoping one of them will help the class win. Other students tend to overlook him, but Karasuma soon notices that Nagisa has an unusual talent for moving close to a target without being noticed. He is gentle and careful, and many of the early plans start from his notes. Japanese voice: Mai Fuchigami.
Karma Akabane returns to Class 3-E after a suspension for fighting. He is one of the smartest students in the school, with grades good enough for the top class, yet he enjoys pranks and has little respect for authority. He sets up the first assassination attempt that actually lands a hit on Koro-sensei. Clever and confident, he is also an old friend of Nagisa and becomes one of the class's strongest fighters. Japanese voice: Nobuhiko Okamoto.
Kaede Kayano sits next to Nagisa and is the student who gives Koro-sensei his name, a pun on the Japanese words for kill and can't kill. She is cheerful, friendly and full of energy, wears her green hair in two bunches, and loves pudding so much that she once builds a giant one as an assassination trap. She is often the one who lightens the mood when the class is tense. Japanese voice: Aya Suzaki.
Gakushu Asano is the son of the chairman and the top student of Kunugigaoka, at the head of Class 3-A and the student council. He is brilliant, ambitious and proud, and he sees Class 3-E as beneath him. His rivalry with Karma over grades drives several arcs, and his relationship with his own father is cold and competitive. Japanese voice: Mamoru Miyano.
Tadaomi Karasuma is an officer of Japan's Ministry of Defense sent to watch Koro-sensei and train the students. He becomes the class's physical education teacher, teaching them knife work, marksmanship and teamwork. He is strict and serious, and Koro-sensei's jokes rarely make him smile, but he treats the students fairly and takes their safety seriously. He is also a highly skilled fighter in his own right. Japanese voice: Tomokazu Sugita.
Irina Jelavic is a professional assassin hired to kill Koro-sensei while posing as an English teacher. She speaks many languages and relies on charm and social skills rather than force. At first she looks down on the students, and they give her a teasing nickname. After a failed attempt she begins to teach them in earnest, especially how to talk to people from other countries. She has a soft spot for Karasuma. Japanese voice: Shizuka Ito.
Yuma Isogai is the male class representative of 3-E. He is calm, kind and good at almost everything, so the other students trust him to lead. His family has little money, and he was sent to 3-E partly because he broke school rules by working a part-time job to help at home. He is quick in a fight and often leads the class's group plans. Japanese voice: Ryota Osaka.
Megu Kataoka is the female class representative of 3-E. She is a strong swimmer, responsible and straightforward, and classmates often call her a natural leader. She looks after people even when it is not her job, and she has a hard time saying no when someone asks for help. In assassination plans she often takes charge of planning and coordination. Japanese voice: Chie Matsuura.
Ryoma Terasaka is the big, loud troublemaker of Class 3-E. At first he refuses to take the class seriously, picks fights and leads a small group of friends who skip most of the class plans. He is rough and quick to anger, but he is also loyal to his friends and more honest than he lets on. His attitude toward the class changes as the year goes on. Japanese voice: Subaru Kimura.
Manami Okuda is a shy student who is very good at chemistry but struggles with language and expressing herself. In an early episode she tries to poison Koro-sensei with chemicals she mixed herself, and he answers by helping her improve her experiments instead. She keeps working with chemicals throughout the series and often supplies the class with tools for their plans. Japanese voice: Sayuri Yahagi.
Tomohito Sugino was a baseball player who lost his place on the school team when he was sent to Class 3-E. He is one of Nagisa's closest friends and is friendly and easygoing. In one of the first attempts he throws a baseball at Koro-sensei, and the teacher later coaches him on how to make the most of his pitching style. Japanese voice: Yoshitaka Yamaya.
Rio Nakamura is a blonde student with the best English in Class 3-E. She is clever and playful and enjoys teasing her classmates, especially Nagisa. She often works with Karma on pranks and quick schemes, and she keeps her sense of humor even under pressure. Despite her relaxed manner, she does well in school when she decides to try. Japanese voice: Manami Numakura.
Ritsu is an autonomous artificial intelligence sent to Class 3-E as a transfer student. She lives inside a large box fitted with guns and appears on its screen as a girl. At first she fires at Koro-sensei during lessons and disrupts the class. With some help, she learns to work with her classmates and becomes a useful member of the team, able to access networks and store huge amounts of information. Japanese voice: Saki Fujita.
Gakuho Asano is the chairman of Kunugigaoka Junior High. He created the system that keeps Class 3-E at the bottom so that the other students work harder to avoid ending up there. He is extremely intelligent and calm, believes in strength and results above all, and is willing to use almost any method to keep the system in place. He is the father of Gakushu. Japanese voice: Sho Hayami.
Akira Takaoka is a former colleague of Karasuma at the Ministry of Defense who arrives at Class 3-E as a new trainer. At first he acts like a friendly older brother, bringing snacks for the class, but he quickly shows a harsh and violent style of discipline. The students and Karasuma must deal with him in one of the early arcs. His Japanese voice actor is not listed in the sources used for this page.
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