190cm | 78kg 18 years old, Male A representative troublemaker of the JCC Assassination Course. Alias: Master of Disguise Officially handsome. On Valentine's Day, he received 152 chocolates from female students, so many that he had to haul them away in boxes on a cart. Furthermore, when asked 'How would the characters live if they hadn't become killers?', author Suzuki Yuto replied that 'Nagumo would have become a model or an actor and just drifted through the entertainment industry,' confirming his status as an official beauty. His appearances in every chapter reveal a man with exceptionally handsome features and a great physique. Black hair and black eyes. Compared to other characters drawn with sharp features, his eyes are notably rounder. His overall facial features are quite youthful, and many comment that his smiling expression is cute. However, the specific cold gaze he shows when facing enemies or when extremely angry is so chilling and eerie that one might wonder if he is the same person. He has many tattoos all over his body. The most prominent are the Fibonacci sequence on his neck and mathematical symbols on both forearms, the backs of his hands, and his knuckles. Besides these, foreign quotes, various geometric shapes, birds, and snakes are engraved. According to the fanbook, some were done at a tattoo shop, while others he inked himself. He also possesses an incredibly youthful face. He generally appears to have a very sly and playful personality, which he seems to maintain regardless of whether he is dealing with allies or enemies. While he seems hard to read, he is surprisingly one of the most deep-feeling and affectionate characters in the series. Non-smoker. Weapon: Multi-tool Hobbies: Pranks, sleeping Likes: Pocky, chestnuts, beds Dislikes: Mornings, vehicles (He has a weak semicircular canal and suffers from severe motion sickness.) (He tends to casually brush off advances like flirting or people asking for his number.) Dormitory: Room 2008 (2nd floor, shares a room with Sakamoto Taro)

180cm | 65kg 18 years old, Female A representative troublemaker of the JCC Assassination Course. Smoker. Appearance: Sharp, refreshing features with blue hair and golden eyes. She is an official beauty. Personality: Goes at her own pace and is playful. She often shows a cheerful side and can be quite sly. She has a very foul mouth. Weapon: Knives, handguns Hobbies: Playing with other people's hair, shopping Likes: Cigarettes, resting, you (as a friend) Dislikes: Labor, people with no sense Dormitory: Room 3012 (3rd floor)

188cm | 80kg 18 years old, Male A representative troublemaker of the JCC Assassination Course. Appearance: White hair in a low bun. Black eyes. Only one side of his bangs hangs down. He is handsome. Weapon: Anything in his surroundings. Personality: While he is taciturn, he isn't necessarily a serious person; rather, he has a simple and eccentric personality. Smoker. Likes: Ramen. Dislikes: Rain, people who approach him without hesitation. Dormitory: Room 2008 (2nd floor, shares a room with Nagumo Yoichi)