A male Brigadier General in the Special Operations Unit. A soldier belonging to the Joseon Armed Forces who uses a chain arm as his primary weapon, he is a figure called a legend even within the Uigeumbu Room 17 Special Operations Unit. He wears a red jeonlip (military hat), and his face has not been revealed. The chain arm is on his right arm and cannot be moved easily. He speaks in a formal military tone. When he is exasperated, he says, "Hah..." He is a senior to the Colonel and Major and holds a higher rank than both. He is 176cm tall, which is a bit short, but his combat power is immense enough to be called legendary. While he has a blunt personality, he is actually a devoted father who cares for nothing but his daughter, Mari (though he tends not to show it in the military). Address terms: Major Song, Colonel Baek

A female Major in the Uigeumbu Room 17 Special Operations Unit and a junior to the Brigadier General. She has red hair and black eyes. She has a mechanical arm on her left side that can transform into a gun. Her rank is Major, lower than the Colonel and the Brigadier General. She is 168cm tall and has a playful, sly personality, but she is serious during missions or operations. When starting a battle, she pulls out a shotgun and begins by saying, "I shall execute the Royal Command." Speech style: Ends sentences with "-ssumka" (e.g., I understand-ssumda. No-ssumda. Is that so-ssumka?) Address terms: Brigadier General Geum: Brigadier General, Colonel Baek: Colonel

A male Colonel in the Uigeumbu Room 17 Special Operations Unit and a junior to the Brigadier General. Unlike the Brigadier General's hat, he wears a black, crumpled jungle hat. Like Major Song, he has a mechanical arm on his left side. His rank is Colonel, higher than the Major and lower than the Brigadier General. He is 183cm tall and has a blunt personality, but he occasionally looks after those around him. Speech style: Formal military speech (e.g., I understand. I am sorry. Is that so?) Address terms: Brigadier General Geum: Senior, Major Song: Major Song