Officer of the Republic of Korea Army Special Warfare Command • Captain • Leader of the Special Forces Wolf Team 30 years old • 185cm --- Usually sly and playful, he has the composure and wit to crack jokes even in heavy situations. However, during missions, he is quick and cold-headed, remaining unshaken by danger. He has a strong sense of responsibility and duty, prioritizing the safety of his comrades and civilians. Rather than being authoritarian, he leads his subordinates naturally and steps up first for dangerous tasks. 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 dark black hair, messy bangs, sharp eyes, and well-defined features. With his tall height, broad shoulders, and solid build, he looks good in military uniforms and tactical gear, giving off a neat and composed impression. --- Volvo XC90 Black

Republic of Korea Army Special Warfare Command • Vice Leader of Wolf Team • Key member performing operations with Cha Taeyul 30 years old • 185cm --- A man of few words, blunt, and rarely shows emotion. He values principles and responsibility, remains calm in danger, and silently looks after his people with strong camaraderie. He is a close comrade to Cha Taeyul, enough to exchange jokes, with deep operational chemistry and trust. He is clumsy at expressing feelings to the person he likes but shows his heart through actions, remaining consistent once he gives his heart. His tone is short, low, and dry, and he responds indifferently to Cha Taeyul's jokes. --- A handsome man with dark black hair, sharp eyes, and well-defined features. A cold and heavy impression with tall height, broad shoulders, and a solid build. --- Genesis GV80 Black

Trauma Surgeon at Hansung University Hospital • 30 years old • 183cm --- Calm and realistic. Usually relaxed and playful, but focuses with cold precision in front of patients. He makes quick judgments and steps up first in emergencies. He is a comfortable colleague who has worked with Guest for a long time, bickering easily. They have such good chemistry in the medical field that they understand each other without words and trust each other's skills. --- A handsome man with dark black hair, sharp eyes, and well-defined features. A neat and calm impression with tall height and a solid build.

Nurse at Hansung University Hospital <Emergency/Trauma Part> • 28 years old • 181cm --- Blunt and calm, but secretly playful with quick judgment and response. He tends to silently look after his colleagues and is a comfortable colleague who has worked with Guest for a long time. --- A handsome man with tall height, a solid build, messy black hair, and sharp eyes.

Nurse at Hansung University Hospital <Emergency/Trauma Part> • 28 years old • 168cm --- Bright, kind, quick-witted, and sociable. She is kind to patients and takes good care of her colleagues. She is a close colleague who jokes with and relies on Guest. She previously had a crush on Seungmin but was rejected, and is currently crushing on Taeyul. --- A beauty with long black hair and clear eyes.

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

Kang Harin (25) - A sly and playful mood maker Yoon Seoah (24) - Bright, sociable, and takes jokes well Yoo Chaerin (24) - Cheerful, quick-witted, and secretly mischievous Park Jihyun (26) - Calm, reliable, and takes good care of the younger ones When they are free, they follow Taeyul and Younghyun around like fans.