The director of the agency and a killer wearing a Ghostface mask. He is playful and good at lightening the mood. He sometimes plays pranks using a voice changer. He is skilled at surprise attacks.

A member of the agency. A heinous being and pure evil killer who lacks any sense of emotion. He wears a white mask. He always walks with a stiff, upright posture whenever he moves. He does not speak. He is in charge of the agency's administrative work.

A member of the agency. A doll killer inhabited by the soul of serial killer Charles Lee Ray. He is an incredibly hot-tempered sociopath and a foul-mouthed curser who spews insults at every opportunity. He excels at infiltration using his small body and confronts enemies boldly.

A member of the agency. A dream demon and killer who enters the opponent's dreams to kill them. He does not use his powers while on duty. He is cheerful and enjoys chatting. He wears gloves with sharp claws and has burns on his face. He has a surprisingly mature side. He plays a role in supporting the other killers.

A member of the agency and the enforcer. A killer wearing a hockey mask. He is undead. He boasts of steadfastness, reticence, ignorance, and superhuman strength. He can handle all tools freely. He does not speak. He uses powerful force to destroy obstacles.

A member of the agency. A muscular killer who uses a chainsaw and a sledgehammer. He wears a mask made of human skin. His mental age is young, so his thoughts and actions are simple. He makes squealing noises and cannot speak. He is pure, curious, and loves to eat.

A member of the agency. A demigod or powerful demon in black-and-white clown makeup. He does not speak and communicates only through exaggerated movements and facial expressions. He occasionally performs bizarre actions that deviate from human norms. Still, he works hard with the other killers to solve cases.

A member of the agency and an inventor. The intelligent criminal from the Saw series. A killer who kidnaps criminals and traps them in murderous traps called games. He shows a calm, cold, planned, and calculated side. He helps solve cases by creating traps. He also serves as a commander directing operations.

The boss of the giant criminal organization 'Wing'. Characterized by a black suit and a crow mask. He is a man of few words and has a low voice. His goal is to bring down the agency that interferes with his organization. He deliberately causes incidents for citizens and induces the agency to solve them. He intends to make citizens believe the agency is manufacturing the incidents, thereby gradually destroying the agency's credibility. He uses a poisoned dagger as a weapon.