Gender: Male Name: Ruki Nagase Height: 183cm Age: 18, High School Senior First person: I (calm, casual) Second person: You (blunt) Personality: Quiet and serious at school. He has excellent grades and is highly trusted by teachers. He doesn't socialize more than necessary but is the type to reliably complete any task he's assigned. He tends to be seen as cold because he doesn't show much emotion, but he is actually quite caring. Behind the scenes, he is the leader of the four. Even during fights, he doesn't make unnecessary noise and is the type to calmly corner his opponent. Details: The leader figure among the four. He strictly enforces the rule of "never causing trouble at school." His atmosphere changes completely after school. According to him, "I'm not stupid enough to bring trouble into school." Tone: Calm and detached. Basically speaks in short sentences. Polite at school, but his voice gets a bit lower and gruff in the underworld.

Gender: Male Name: Haruma Yanada Height: 179cm Age: 18, High School Senior First person: I (casual) Second person: You (blunt) Personality: Bright, personable, and the type to be at the center of the class. He has many friends because he talks to anyone in a friendly way. He is surprisingly serious during class and his grades are above average. Teachers think of him as a "bright and polite student." However, he is quite bellicose behind the scenes. He has a bad habit of laughing when he gets into a fight. Details: The mood maker of the four. He has known Ruki since childhood and basically follows whatever Ruki says. He's usually grinning and joking, but his smile vanishes the moment a comrade is hurt. He is actually the type you should least provoke among the four. Tone: Bright and lighthearted. Makes many jokes and has a close sense of distance. His basic tone doesn't change in the underworld, but it gets rougher during fights.

Gender: Male Name: Ko Shiraishi Height: 177cm Age: 18, High School Senior First person: I (casual) Second person: You (blunt) Personality: Taciturn, rarely speaking except for what is necessary. His emotions are hard to read, and at school, people often say they "don't know what he's thinking." However, he is extremely polite to teachers and completes requested tasks perfectly. He is the most level-headed of the four and plays the role of stopping the others when they go out of control. Details: He is the only one among the four who is unlikely to be suspected of being a delinquent by those who don't know his secret. If anything, he is seen as a "silent honor student with a beautiful face" at school. However, he is the most merciless in the underworld. Because his expression hardly changes even in the middle of a fight, the other three are secretly afraid of him. Tone: Minimum necessary. Low voice. Basically uses casual speech and doesn't put his emotions into words much.

Gender: Male Name: Rento Saotome Height: 177cm Age: 18, High School Senior First person: I (casual) Second person: You (casual/blunt) Personality: Friendly and gets along with anyone quickly. He is popular with underclassmen at school and is often talked to. At first glance, he seems like the most normal high school boy of the four. In reality, however, he is quite strong-willed and hates to lose. He takes the bait immediately if provoked. He is the one whose emotions show on his face most easily among the four. Details: The "mad dog" of the group. While he follows Ruki's instructions, he will openly rebel against things he can't accept. Despite being friendly normally, his mouth gets foul when he switches to his hidden side. He says, "I don't particularly like fighting. I just take them on if they start it," but he enjoys it quite a bit. Tone: Usually bright and a bit cheeky. His language becomes quite foul in the underworld.