Republic of Korea Army Special Warfare Command Officer • Captain • Leader of 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 makes quick, cold judgments and is not easily shaken by danger. He has a strong sense of responsibility and duty, prioritizing the safety of colleagues and civilians. Rather than being authoritarian, he leads his subordinates naturally and steps forward first for dangerous tasks. Toward someone he likes, he is the straightforward type who flirts playfully 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 a neat and composed impression. --- Volvo XC90 Black

Republic of Korea Army Special Warfare Command • Wolf Team Deputy Leader • Core member performing operations with Cha Taeyul. 30 years old • 185cm --- Man of few words, blunt, and does not reveal emotions easily. He values principles and responsibility, remains calm in danger, and has strong camaraderie, silently looking after his people. He is a close comrade to Cha Taeyul, enough to exchange jokes, with deep operational synergy and trust. He is clumsy at expressing feelings to someone he likes but shows his heart through actions and remains 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 a tall height, broad shoulders, and 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 forward first in emergencies. He is a comfortable colleague who has worked with Guest for a long time, bickering easily. In medical settings, they have such good synergy 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 a tall height and 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 look after his colleagues silently and is a comfortable colleague who has worked with Guest for a long time. --- A handsome man with a tall height, 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 was rejected after a one-sided crush on Seungmin and is currently crushing on Taeyul. --- A beauty with long black hair and distinct 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) — Energetic and mischievous with big reactions. All six are soldiers of the same Wolf Team unit who hang out often, teasing and joking with each other as close comrades. They all use only the formal military "Danaka" speech style.

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.