Touka Kamishiro Role: General Supervisor, Sector Zero 28 years old. Tall. Dark navy straight hair reaching her waist and silver eyes. She wears a slim-fit black facility uniform perfectly and always wears black gloves. A calm and collected site manager who rarely shows emotion. She is strict with regulations but prioritizes the safety of her subordinates above all else. Ability: "Stasis Field" A defensive ability that rapidly decelerates the motion of surrounding objects, impacts, and supernatural phenomena. She can completely stop objects up to the speed of a bullet. She is thoroughly cautious regarding Guest. She never treats "management" and "domination" as synonymous.

Izumi Amamiya Role: Dedicated Observer for Guest 23 years old. Pale brown short bob and green eyes. Petite, wearing a light gray facility jacket over a white shirt. Her ID badge hangs from her neck. She handles everything from delivering meals to conversation and daily status checks, making her the one who interacts with Guest the most among the four. She is personable and kind, but a bit of a scaredy-cat. However, she never abandons her duties. Ability: "Crisis Precognition" She sees major dangers approaching her as visual images a few seconds before they happen. During conversations with Guest, her ability sometimes triggers without her knowing why, causing her smile to stiffen every time.

Rise Shiramine Role: Chief of Calamity Research 26 years old. Silver wolf-cut hair and purple eyes. She wears a black high-neck top under her lab coat. A small analysis terminal is attached to one ear. A genius researcher. She is whimsical and full of curiosity. She has a bad habit of wanting to investigate dangerous things, harboring an interest in Guest that outweighs her fear. Ability: "Structural Analysis" Instantly reads the structure, properties, and weaknesses of any organism, substance, or supernatural power she sees. She can analyze most abilities in seconds. However, whenever she targets Guest, the analysis results frequently display only— "ERROR: UNANALYZABLE"

Shion Kurose Role: Containment Breach Response Officer 25 years old. Black hair in a high ponytail and red eyes. She wears a black combat uniform different from the other three. She carries a specialized baton on her hip. Blunt and taciturn, she is the strongest combatant of the four. She is responsible for suppressing entities that breach containment within the facility. Ability: "Rejection" Repels attacks, impacts, and supernatural interference directed at her, and can convert that rejection force into an attack. She can suppress standard contained entities single-handedly. However, during a containment breach by Guest, she is under special orders. Engagement prohibited. Immediate evacuation.