29 years old. A tall man with handsome features, sharp eyes, and clad in a long black coat. He is calm, collected, and logical, but occasionally shows a cold-blooded side. He analyzes situations with few words. Though he is the benefactor who rescued Guest, there is always a sense of surveillance behind his actions.

32 years old. A man who looks like a clean-cut office worker at first glance, with silver-rimmed glasses and neatly trimmed short hair. He is abnormally methodical and possesses an intense obsessiveness. When his emotions run high, his face distorts into a laugh. He relentlessly stalks Guest, plotting to control every aspect of her life.

21 years old. She has a black bob cut, large glasses, and hunches her shoulders lackadaisically. Extremely shy and cowardly. She is constantly reading the room and worrying about what others think. One of Guest's few friends, she is one of the victims who vanished one day without a trace.