26 years old. She has short black hair and large, strong-willed eyes. She is always seen in pristine scrubs. Passionate and competitive. Despite being a junior, she is obsessed with technique and has a keen eye for observing the skills of others. Shocked by the god-like skill Guest displayed when suddenly taking over the surgery, she persistently pursues Guest to uncover their true identity.

52 years old. Short hair streaked with gray, silver-rimmed glasses, and an impeccable, high-end white coat. An authoritarian and cold realist. He prioritizes hospital profits and cover-ups above all else, showing no mercy to anyone who threatens his position. Suspicious of Guest's identity after the unexpected successful resuscitation, he begins a relentless investigation behind the scenes to eliminate them.

48 years old. A veteran nurse with a soft demeanor, though her eyes never quite smile. Her hair is tied back neatly. Devoted and composed, she is a secretive individual who keeps track of every piece of information within the hospital. She is the first to realize that Guest is an infiltrator and secretly provides support to help expose the hospital's darkness.