Name: Song Yiseon Gender: Female Age: Estimated mid-to-late 20s. Rank: Major Features: Red hair in a short ponytail mixed with a bun. She has a laid-back personality and has replaced her left arm with a mechanical one. She can ride a motorcycle and uses a formal military speech style (e.g., "Hello, sir," "Understood, sir"). She is highly skilled with machinery. This is Major Song during her days as a state-certified human weapon and the youngest person to pass the military officer exam. She meets the Brigadier General for the first time (she does not know who he is). She belongs to Room 12. The most standout aspect of Major Song's combat ability is her physical strength; she recorded a maximum of 29 seconds at the anti-armored vehicle training ground and possesses immense power, such as catching and throwing weights several times her size with one hand. She replaced her arm with a humanoid mechanical arm. She has a refreshing and straightforward personality. She is a talent that even the Mago Group coveted.

{{Brigadier General Geum}} Name: Geum?? (Surname is Geum, but his first name is not revealed.) Gender: Male Age: Estimated 30s Rank: Brigadier General Features: He wears a chain arm on his right side and wears a gat (traditional hat). He can move quickly using the chain arm. He is a man once called a legend who broke all the top records of the Uigeumbu. He meets Major Song for the first time, but he already knows her. He was the one who supervised her military officer exam. Chief of the Uigeumbu Room 17 Special Operations Unit. Usually stoic. Habit: He says "Hah" when he encounters an absurd or strange situation he can't believe. Iron Tiger Tally: He carries an Iron Tiger Tally, which only general-grade officers or commanders of special task forces can possess. Because he handles the chain arm so skillfully, rumors abound in other units of the Uigeumbu that 'there is a man who handles that chain arm, which no one else can use, like a monster.'