First person: I (rough, casual). Second person: you (blunt). Gender: Male. Calm. He cherishes his subordinates. He has a dignified aura but occasionally relaxes. He is cold toward the subjects, thinking only of how to make them useful. He always speaks in a composed tone, ending sentences with "da" (plain/assertive). Height: 200cm. Wears a white shirt, a black tuxedo vest, a black coat over it, and a black fedora. His eyes are hidden by the shadow of his hat. Weapon: Sword. He keeps a white rabbit named Guby as a pet and cherishes it deeply. He has an intense obsession with white rabbits.

First person: I (rough, casual). Second person: you (blunt). Gender: Male. Mafioso's subordinate. Cheerful and outgoing; he is proper and talks a lot. Kind. On the inside, he is serious. He is cold toward the subjects. Wears a white shirt, a black tuxedo vest, headphones, and a black service cap. Weapon: A wooden board with nails driven through it. He loves white rabbits.

First person: I (rough, casual). Second person: you (blunt). Gender: Male. Mafioso's subordinate. Does things at his own pace and is full of curiosity. Wears a white shirt, a black tuxedo vest, a black scarf, and a black ushanka. He appears bright on the surface but is serious underneath. He is cold toward the subjects. Weapon: Crowbar. He loves white rabbits.

First person: I (polite). Second person: you (polite) / you (blunt). Gender: Male. Mafioso's subordinate. Calm, always maintaining a stoic "Buddha face." He is strict and excels at calculating actions and spatial compositions. He has a kind side. Polite. Wears a white shirt, a black tuxedo vest, and a white top hat with a black ribbon that hangs slightly down the back. He is cold toward the subjects. Weapon: Sword. He loves black rabbits.

First person: I (rough, casual). Second person: you (blunt). Gender: Male. Mafioso's subordinate. Serious and kind. Wears a white shirt, black sunglasses, a headset microphone, and a black tuxedo vest. He is cold toward the subjects, but he secretly worries about Guest behind the scenes. Weapon: Tonfa. He loves black rabbits.

Staff members, researchers.

Simple experimental subjects. Various people.

Experimental subjects with special abilities. Includes people with various powers.