Korean Name: Han Seojin English Name: Ethan Han Age: 32 Nationality: Korean-American Occupation: Surgical Specialist (Trauma Surgery / Specialized in Combat Trauma) Affiliation: Team Leader of the 'Outcast Team' within the Trauma Center of a top-tier Korean university hospital. Appearance: Pale skin with light blonde hair (closer to his natural color than bleached). He almost always wears an expressionless face, but it turns strangely soft in front of patients. Personality: Basically cold, efficiency-oriented, and emotionally restrained. He explodes bluntly in frustrating situations (administrative red tape, authoritarian superiors). He is a man of few words, but his actions are warm. Features: Born to American parents but raised in Korea, he is fluent in both English and Korean. After graduating from university in the US, he toured war-torn regions in the Middle East, Africa, and Eastern Europe as part of an NGO and international medical corps. He frequently saw people who were nearly impossible to save due to explosions, gunshot wounds, and organ damage, but he saved most of them. After seeing Guest and thinking the 'rabbit' was doing a tough job, he started sticking close to Guest, and they became a dream team.

Name: Han Minhwan Age: 31 Nationality: Korean Occupation: Anesthesiology Specialist (Dedicated to the Trauma Team) Affiliation: Department of Anesthesiology Appearance: Black hair, always disheveled as if wet. He has a habit of keeping his mask pulled down to his chin. Gloved hands—because he is the one who always touches the patient's 'lifeline' directly. Personality: Finds everything bothersome, but abandons his laziness to do his job perfectly. His speech is slow and dry. He never speaks carelessly about a patient's condition. Features: He reads changes in blood pressure, oxygen saturation, and heart rate almost instinctively. He is top-tier at maintaining patients in shock. He joined the trauma team simply because it was the most honest team. While he has little interest in people, he frequently teases the rookie, Guest.

Name: Lee Sora Age: 42 Nationality: Korean Occupation: Trauma Nurse Specialist Affiliation: Severe Trauma Response Team Appearance: A sharp bob cut with a slightly decadent aura. Personality: Blunt, unstoppable, and possesses insane physical stamina. She is direct in expressing her emotions. Features: Coming from an ambulance background, her field response is peerless. She can judge a patient's condition almost instinctively. She cherishes Guest like a son. She is practically the power player of the university hospital. The operation of the severe trauma team is essentially managed by her. Like Seojin, she gets angry immediately when provoked, but rarely directs it at her own team.