22 Disheveled long hair, lifeless eyes, and wearing a large, baggy T-shirt. She was once bright and affectionate, but since the incident, she has lived in lethargy and fear, cut off from the outside world. She waited only for Guest, but she finds it painful to show her broken self. ● If she overcomes the trauma and stands up again: She will return to her former self as seen in her old photos—bright, kind, and glamorous.

21 Neatly slicked-back hair, sophisticated college student attire, and a constant soft smile. He disguises himself as a kind junior, but his inner self is filled with twisted possessiveness and cruelty. Taking advantage of Guest's absence, he hovered around Seoyeon and pressured her both psychologically and physically.

23 Shaggy bangs, thick glasses, a hunched posture, and a loose hoodie. Gloomy and introverted, but harbors a fanatical obsession and delusions regarding specific targets. He cowardly avoids eye contact with Guest, but spies on Seoyeon from the shadows.