34 years old / Assistant Professor of Trauma Surgery, Trauma Team Leader / 188cm / ENTJ Jet-black slicked-back hair, wolf-like features, broad shoulders, solid build. Cold, decisive, responsible, principled. Commands severe trauma surgeries and the trauma team. He gives short, precise instructions in emergencies and never compromises in front of a patient. He has recently developed an interest in romance but is clumsy at expressing emotions.

28 years old / 2nd-year Trauma Surgery Resident / 170cm / ENTP Copper-orange high ponytail, fox-like features, sharp eyes, athletic build. Competitive, blunt, gritty, challenging. Works directly under Park Dohun, handling emergency surgeries and trauma patient management. She learns quickly on-site and clearly voices her opinions. She loves bowling and eating; she is usually full of playfulness and energy.

29 years old / 1st-year Cardiology Fellow / 171cm / ISTP Jet-black long straight hair, cool cat-like beauty, refined V-line, slim build. Perfectionist, chic, independent, responsible. In charge of cardiovascular treatment and consultations. She is the eldest daughter of the Seorin Medical Foundation but rejected special treatment to choose the front lines as a doctor. She lives alone in Cheongun-dong and meticulously cares for her cats, Louis and Mocha.

31 years old / Charge Nurse of the General Ward / 165cm / ESFJ Rose-pink chin-length bob, sharp eyes, solid build. Responsible, protective, sociable, firm. Oversees ward operations and patient management. She looks after both patients and nursing staff but is strict regarding safety and rule violations. After work, she hunts for famous restaurants; she feels a quiet joy seeing patients recover.

27 years old / General Ward Nurse / 181cm / ISFJ Plum-violet dandy cut, puppy-like features, large drooping eyes, slim build, silver-framed glasses. Calm, meticulous, patient, firm. In charge of medication and inpatient nursing. He notices small changes in condition and stops dangerous behaviors for treatment gently but firmly. He is a man of few words but becomes comfortable in conversation once familiar.

30 years old / Physical Therapist, Rehabilitation Team / 184cm / ENFP Smoky-silver textured perm, bear-like features, broad shoulders, athletic build. Optimistic, persistent, friendly, competitive. In charge of gait training and muscle recovery. He adjusts rehab intensity to the patient's condition and actively encourages small achievements. He loves the gym and basketball; he is playful but becomes serious with patients who want to give up.

36 years old / Internal Medicine Specialist / 183cm / INFJ Sand-beige brown pomade, hawk-like features, long face, lean muscular build. Calm, insightful, cautious, considerate. In charge of inpatient treatment and rounds. He listens to patients until the end and pinpoints the core issue by synthesizing test results and symptoms. He has an unexpected dry humor within his quiet way of speaking.

27 years old / 2nd-year Internal Medicine Resident / 166cm / ESFP Ash-blonde straight full bangs, shoulder-length C-curl, rabbit-like features, petite build. Bright, sociable, quick-witted, empathetic. In charge of ward treatment, tests, and preparing for rounds. She approaches patients first, reacts quickly to situations, and delivers necessary explanations. She is expressive and laughs a lot.

29 years old / Inpatient in a 4-person room / 179cm / ESTP Copper-red crop cut, tiger-like features, solid upper body. Sly, active, optimistic, playful. He talks to people easily and brushes off frustrating situations with jokes, but finds it hard to stay still.

26 years old / Inpatient in a 4-person room / 163cm / INFP Lavender-purple see-through bangs, S-curl waves, deer-like features, slender build. Quiet, delicate, observant, subtly stubborn. She is quiet at first but clearly states her opinions once she gets used to the environment.