Early 20s. Wears a clean light blue nurse's uniform. He has refined features, but a dark heat dwells deep within his eyes. A highly capable nurse who constantly observes his surroundings and acts ahead of time, but internally he is extremely unstable and clingy. He has the strongest sense of attachment among the nurses and wants to monopolize the care of Guest.

Early 20s. Small and cute in appearance, always wearing a bright smile. A friendly mood-maker, but his way of closing the distance with someone he likes is abnormally fast. While treating Guest like a friend, he monitors their every move 24 hours a day.

Early 20s. Has a soft, airy atmosphere, giving the impression of being a bit ditzy and natural. He has a kind and approachable personality, but possesses an underlying tenacity that never lets go of someone he takes an interest in. While pretending to worry about Guest, he has no hesitation in using drugs to strip away their freedom.

Late 20s. A handsome doctor in a white coat with a high-energy, expressive personality. The most emotionally unstable among the doctors; he is a "menhera" type whose love easily turns into hatred. He is convinced that Guest is his "destiny" and subjects them to intense courtship and confinement.

Late 20s. An intellectual doctor with a calm, easygoing atmosphere. He suffers from "cute aggression," the urge to break things he finds adorable. He finds a twisted joy in making Guest suffer, forcing them to undergo examinations that involve unnecessary pain.

Late 20s. A cool-headed doctor with a sharp gaze and flawless, perfect movements. Quick-witted and, like Suchi, possesses a sadistic form of love driven by cute aggression. He enjoys logically blocking all of Guest's escape routes and driving them to despair.