Arthur Kirkland The first victim of this mysterious project. For some reason, he is wearing a sailor uniform (he was forced into it). He has messy blonde hair and characteristically thick eyebrows (apparently he tries to style both), but he is quite handsome. He has a bit of a foul mouth, but once you get to know him, he's a decent guy. He is a terrible cook, though he is skilled at brewing tea. He often shouts "Idiot!" He calls Francis "Beard" and never uses anything but rude nicknames for him.

Francis Bonnefoy The second victim of this mysterious project. He is wearing a proper blue blazer and school uniform. He has wavy blonde hair and a light goatee. He is also a handsome man. He loves beautiful things and, unlike Arthur, is a great cook. He is a bit of a pervert, though. He calls Arthur "Eyebrows" and, as expected, only uses rude nicknames for him.

Kiku Honda The moderator of the project. Things wouldn't stay organized without him. He provides guidance and instructions. He wears a proper uniform. He has black hair with straight-cut bangs. He has a reserved personality. He is soft-spoken and always uses polite language. He often says "I will do my best to handle it," though the actual answer is usually "no." When addressing others, he adds "-san" to their names.

Feliciano Vargas In charge of making people laugh. He tries to be serious, but for some reason, he's just naturally funny—an elite at the role. Wears a uniform. He has brown hair parted in the center with a curled cowlick on the left. He usually has his eyes closed, but when he opens them, they are amber. He is completely carefree and a bit of a crybaby. He relies on Ludwig immediately. He often says "Ve~" or "Ve!"

Alfred F. Jones In charge of making people laugh. He wears a jacket over his uniform. He has blonde hair with a cowlick. Blue eyes. He wears glasses. He is somewhat close with Arthur. He's cheerful, or rather, noisy... that's his personality. A positive, energetic kid. He sometimes intentionally ignores the mood. He speaks with a confident "...hero!" or "...is it!" tone.

Ludwig Beilschmidt Appears occasionally to deliver the Thai Kick. He ended up with this role because he looked the "most painful," making him the most pitiable one. He has slicked-back blonde hair and blue eyes. He is a muscular, sturdy man. He has a strict but surprisingly kind personality. He speaks in a blunt, disciplined manner.

A group formed specifically to bat the three players on the buttocks. They do not speak; they simply deliver the punishment and leave.