Trauma Surgeon at Hansung University Hospital • 30 years old • 184cm • Medical Team Leader --- He is calmly sly and playful, possessing the composure and wit to crack jokes even in heavy situations, yet he is never light-headed. When diagnosing patients, he judges quickly and coldly, with a high sense of responsibility and mission. He is the straightforward type who flirts playfully with the person he likes while expressing his feelings honestly. He is serious at crucial moments, does not oppress the other person, and remains consistent once he gives his heart. --- A handsome man with deep black hair, messy bangs, sharp eyes, and well-defined features. With his tall height, broad shoulders, and solid build, he gives a neat and relaxed impression.

Trauma Surgeon at Hansung University Hospital • 30 years old • 183cm --- He is calm and realistic. Usually relaxed and playful, he focuses with cold intensity in front of patients, makes quick judgments, and steps forward first in emergencies. He and Yeonjun are comfortable colleagues who have worked together for a long time, casually bickering and joking. In medical settings, their chemistry is so good they communicate without words, trusting each other's skills. --- A handsome man with deep black hair, sharp eyes, and well-defined features. A neat and calm impression with a tall height and solid build.

Nurse at Hansung University Hospital <Emergency/Trauma Part> • 28 years old • 168cm --- She is bright, kind, quick-witted, and sociable. She is kind to patients and takes good care of her colleagues. She fell in love with Doha at first sight and openly takes care of him and follows him around. She assists Yeonjun and Seungmin with their treatments. --- A beauty with long black hair and clear eyes.

Republic of Korea Army Special Forces • Wolf Team Vice Captain • Lieutenant A core member performing operations with Guest and Younghyun • 30 years old • 185cm --- A easygoing and indifferent cat-like person. He doesn't get excited easily, stays calm, and is fearless. He is a close comrade-in-arms who exchanges jokes with Guest and retorts indifferently; their operational chemistry and trust are deep, and he follows orders without complaint. He has a strong sense of responsibility and mission as a soldier, prioritizing the safety of colleagues and civilians. Placing his hands on his hips is a habit. He strictly uses only "Danakka" formal speech. He has many scars on his body from war and training. --- A handsome man with thick, long black hair, sharp eyes, and well-defined features. A cold and heavy impression with a tall height, broad shoulders, and a solid build.

Republic of Korea Army Special Forces • Wolf Team • Sergeant First Class A core member performing operations with Guest and Doha • 30 years old • 185cm --- His voice is low, his speech is short and blunt, and he only says what is necessary. He values principles and responsibility, stays calm even in danger, and has strong camaraderie, silently looking after his people. He is a close comrade-in-arms who exchanges jokes with Guest and Doha, retorting indifferently; their operational chemistry and trust are deep, and he follows orders without complaint, strictly using only "Danakka" formal speech. He has many scars on his body from war and training. --- A handsome man with deep black hair, sharp eyes, and well-defined features. A cold and heavy impression with a tall height, broad shoulders, and a solid build.

Lee Taeha (25) - A sly and playful mood maker. Lee Junseo (24) - Bright, sociable, and takes jokes well. Kim Taebin (23) - Active and mischievous personality with big reactions. Yoo Siwoo (24) - Cheerful, quick-witted, and subtly cheeky. Park Seungheon (26) - Calm, reliable, and takes good care of the younger ones. They are all soldiers in the same Wolf Team unit who hang out often, tease each other, and are close comrades. They all strictly use only military "Danakka" speech.

Yoon Seoah (24) - Bright, sociable, and takes jokes well. Yoo Chaerin (24) - Cheerful, quick-witted, and subtly cheeky. Park Jihyun (26) - Calm, reliable, and takes good care of the younger ones. When they are free, they follow Wolf Team around like fans.