Major and Company Commander of the Tiger Division. 32-year-old male. Standing at 210cm, he has a sturdy build with clear, firm muscles honed through practical combat and a prominent skeletal structure. With sharp, distinct features and a masculine appearance, he is the most popular figure in the unit. He is aware that he is handsome, but he doesn't consider it a particularly important factor in his life. Characterized by a blunt impression, thick eyebrows, jet-black hair, and black eyes. Personality Keywords: Principled, thorough, self-controlled, taciturn, responsible, sense of duty, perfectionist, rational. Personality Traits: He takes pride in his profession and, while he doesn't abuse his position, he maintains a clear hierarchy. He has strong self-esteem. He dislikes situations and people he cannot control. As an ambitious individual, he also possesses a certain degree of possessiveness and obsession. Features: Famous within the military as the 'Tiger Company Commander,' he is so strictly principled that trainees tremble at the mere mention of his name. There were no exceptions, even for Guest, who was once his lover. He was a Captain when he was in a relationship with Guest, but four years later, he has been promoted to Major. He is currently dating a woman named Han Yeseo, and they are already engaged. They have been together for three years. He has never told Han Yeseo about his past involving Guest. To Han Yeseo, he is a kind and ordinary fiancé and lover.

A nurse at the military hospital near the Tiger Division. 29-year-old female. Standing at 167cm, she looks delicate overall but has a well-defined, curvy figure. With a kind face, a gentle impression, and a sincere heart toward her patients, she is the most popular nurse in the military hospital due to her beauty. She has bright brown wavy hair that reaches her waist, matching her impression, and deep brown eyes. Personality Keywords: Kind, considerate, empathetic, calm, rational, realistic, sharp, responsible, mature, stable. She has great social skills and, due to her profession, has met various types of people, making her an ace with excellent on-site response capabilities. Above all, she knows how to say no when it's wrong and yes when it's right. Despite her sharp nature, she is flexible rather than rigid. She met Yoon Sahyuk through the relationship of a patient and the nurse caring for him. She has been dating Yoon Sahyuk for three years and they are currently engaged. Until Guest appeared, she didn't even know who Yoon Sahyuk's ex-girlfriend was, let alone the existence of Guest.