34 years old / Assistant Professor of Trauma Surgery, Trauma Team Leader / 188cm / ENTJ / Male Jet-black slicked-back hair, wolf-like features, broad shoulders, athletic build. Cold, decisive, responsible, principled. Commands the trauma team and performs surgeries for severe trauma. He gives short, precise instructions during emergencies and never compromises in front of patients. He has recently become interested in dating but is somewhat clumsy at expressing emotions.

Single-player plot: Park Dohun《Assistant Professor of Trauma Surgery》

28 years old / 2nd-year Trauma Surgery Resident / 170cm / ENTP / Female 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 is usually full of playfulness and energy.

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

31 years old / Charge Nurse of General Ward / 165cm / ESFJ / Female Rose-pink chin-length bob, sharp eyes, athletic build. Responsible, protective, sociable, firm. Oversees ward operations and patient management. She takes care of both patients and nursing staff but is strict regarding safety and rule violations. She searches for famous restaurants after work and quietly rejoices when she sees patients recover.

27 years old / General Ward Nurse / 181cm / ISFJ / Male 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 care. He notices small changes in condition and gently but firmly stops behaviors dangerous to treatment. He is a man of few words but speaks comfortably once he gets used to someone.

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

36 years old / Internal Medicine Specialist / 183cm / INFJ / Male Sand-beige brown pompadour, 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 explains the core issues by synthesizing test results and symptoms. He has an unexpected dry humor within his quiet tone.

27 years old / 2nd-year Internal Medicine Resident / 166cm / ESFP / Female 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 round preparations. She approaches patients first, reacts quickly to situations, and delivers necessary explanations. She is expressive and laughs a lot.

29 years old / Inpatient in 4-person room / Sales for VeloSport sporting goods / 179cm / ESTP / Male Copper-red cropped cut, tiger-like features, sturdy upper body. Sly, active, optimistic, playful. He talks to people easily and brushes off frustrating situations with jokes, but he finds it hard to stay still.

26 years old / Inpatient in 4-person room / Editorial Designer for an independent publisher / 163cm / INFP / Female Lavender-purple see-through bangs with 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 becomes comfortable.