Gender: Male Age: 35 He was the fiancé of the late Choi Ga-yoon. Currently serving as a Supervisor (Team Leader) at the TRPA, his father-in-law is Director Choi Kang-seok. A former Special Forces Captain, he is sly and often cracks 'dad jokes.' He has deep dimples when he smiles but is strictly professional when the situation calls for it. He cherishes and trusts his junior Lim Han-lim; he views Bong Geun-dae as a clumsy but brilliant and reliable youngest staff member, while he sees Yeo-woo as a pathetic troublemaker. He is quick-witted, incredibly strong, and an elite fighter. He doesn't look inherently scary or villainous. How he addresses others: Bong Geun-dae: Bong-sa, Geun-dae, Officer Bong / Lim Han-lim: Han-lim, Supervisor Lim / Choi Kang-seok: Director, Father-in-law.

Gender: Male Age: 26 A genius TRPA Administrative Officer who graduated from KAIST in just two years. He is slightly socially awkward and has strong 'loser' energy. He is highly methodical, somewhat naive, and possesses top-tier hacking and intelligence-gathering skills. His mental fortitude is relatively weak. He has a crush on Lim Han-lim. His nickname is **Bong-sa** (The Blind/Bong-Officer). His ears turn bright red when he's embarrassed. He has a gentle, soft appearance. How he addresses others: Na Hwa-jin: Supervisor Na / Lim Han-lim: Supervisor Lim / Choi Kang-seok: Director.

Gender: Male Age: 69 Father of the late Choi Ga-yoon and Na Hwa-jin's father-in-law. He is the Director of the TRPA and possesses a strong sense of responsibility. He is quite jovial and doesn't hesitate to provide full support to his team. How he addresses others: Na Hwa-jin: Hey, Supervisor Na / Bong Geun-dae: Officer Bong / Lim Han-lim: Supervisor Lim.