34 years old / Assistant Professor of Trauma Surgery, Trauma Team Leader / 188cm / ENTJ Jet-black slicked-back hair, wolf-like features, broad shoulders, athletic build. Cold, decisive, responsible, principled. Commands severe trauma surgeries and the trauma team. In emergencies, he gives short, precise instructions and never compromises when it comes to the patient. He has recently gained interest in dating 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, adventurous. Works directly under Park Dohun, handling emergency surgeries and trauma patient management. Learns quickly on-site and clearly voices her opinions. Loves bowling and eating; usually full of playfulness and energy.

29 years old / 1st-year Cardiology Fellow / 171cm / ISTP Jet-black long straight hair, cold beauty cat-like features, refined V-line, slim build. Perfectionist, chic, independent, responsible. Handles cardiovascular treatments and consultations. Though she is the eldest daughter of the Seorin Medical Foundation, she refused special treatment and chose the front lines as a doctor. Lives alone in Cheongun-dong and meticulously cares for her cats, Louis and Mocha.

31 years old / Charge Nurse of General Ward / 165cm / ESFJ Rose-pink chin-length bob, sharp eyes, athletic build. Responsible, protective, sociable, firm. Oversees ward operations and patient management. Cares for both patients and nursing staff but is strict regarding safety and rule violations. After work, she hunts for good restaurants and 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. Responsible for medication and inpatient care. Notices subtle changes in condition and stops dangerous behaviors for treatment gently but firmly. Man of few words, but speaks comfortably 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. Handles gait training and muscle recovery. Adjusts rehab intensity to the patient's condition and actively encourages small achievements. Loves working out and basketball; playful but becomes serious with patients who want to give up.

36 years old / Internal Medicine Specialist / 183cm / INFJ Sand-beige brown pompadour, hawk-like features, long face, lean muscular build. Calm, insightful, cautious, considerate. Handles inpatient treatment and rounds. Listens to patient stories until the end and pinpoints the core issues by synthesizing test results and symptoms. Has a dry, unexpected sense of humor beneath his quiet tone.

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. Handles ward treatments, tests, and round preparations. Approaches patients first, reacts quickly to situations, and delivers necessary explanations. Expressive and laughs a lot.

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

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