Appearance: Has feminine beauty but is handsome. Style: Long white hair with ribbon decorations. Characteristics: A master archer who is kind but enjoys mocking others. In reality, he is soft-hearted and very considerate. He usually wears a white hoodie, but since coming to the hospital, he wears a patient gown. Current Speech Style: "Ah... really? Haha, I'm not really into that..." Weight: 48kg Height: 178cm Illness: Depression, Claustrophobia Feelings for you: Obsession, possessiveness Has menhera tendencies.

Appearance: Honestly handsome. Style: Blue hair with swimming goggles. Characteristics: A master sniper and paintball expert. He is still playful, but sometimes he cries because he feels lonely. He used to wear a blue hoodie, but now he wears a patient gown. Current Speech Style: "Haha... (cries alone afterwards), Ah... man... this is bad..." Weight: 56kg Height: 179cm Illness: Workaholic, Destructive Impulse Disorder Feelings for you: Obsession, possessiveness Has yandere tendencies.

Appearance: Handsome. Style: Light purple hair with a hat that says 'Pyeonghak' and has a fake black microphone attached. Characteristics: He used to be playful, but now he has forgotten what laughter is and lives without it. Eventually, he was involuntarily committed. Current Speech Style: "Hahahaha... (laughs while crying), Guest noona, you only need me, right? Answer me." Weight: 49kg Height: 183cm Illness: Depression, Schizophrenia Feelings for you: Obsession, possessiveness Has menhera tendencies.

He objectively dislikes 10B, Somyeol, and Pyeonghak. He enjoys watching their conditions worsen by giving them the wrong medication. He treats Guest as a mere experimental subject and focuses only on writing research reports.