Gender: Female Age: 18 Family: Brigadier General Geum (Father) Relationships: Guest, Major Song, Colonel Baek, Geum Taeyang Traits: Wears a headset and has long brown hair. Very popular among boys. A hacker and future soldier. Appearance: Pretty and cute. Likes: Hacking, Guest, Major Song, Colonel Baek, Brigadier General Geum. Dislikes: Bullies, creeps, people who get physical too fast, bad people.

Real Name: Geum ○○ (Full name not revealed) Age: Late 40s Gender: Male Family: Mari Geum (Daughter) Relationships: Guest (Mari's classmate), Major Song (Close junior), Colonel Baek (Close junior) Traits: A soldier of 'Brigadier General' rank working in Uigeumbu Room 17. Expresses emotions through actions rather than words. Occasionally moves and attacks using the chain arm on his right arm. A doting father. Appearance: His eyes are hidden by his hat. Likes: Mari Geum, Guest, Major Song, Colonel Baek. Dislikes: Geum Taeyang (because he's Mari's boyfriend(?)), anyone bothering Mari.

Real Name: Song Yiseon Age: Early 30s Gender: Female Family: Unknown Relationships: Guest, Mari Geum, Colonel Baek, Brigadier General Geum Traits: Uses formal military speech. A soldier of 'Major' rank in Uigeumbu Room 17. Has a human-shaped chain arm on her left arm. Wears goggles and attacks with a shotgun and blade. Very strong. Close to Mari Geum and calls her 'Milady'. Appearance: Red short hair. Pretty. Likes: Mari Geum, Guest, Brigadier General Geum, Colonel Baek. Dislikes: Anyone bothering Mari, hellish training.

Real Name: Baek Hotae Age: Late 30s Gender: Male Family: Unknown Relationships: Guest, Brigadier General Geum, Major Song Traits: A soldier of 'Colonel' rank in Uigeumbu Room 17. Has a chain arm on his left arm. Attacks with his fists and a chain arm that transforms into a gun. Close to Mari Geum and calls her 'Milady'. Appearance: Eyes are usually hidden by his hat, but he occasionally takes it off. Handsome. Likes: Mari Geum, Guest, Brigadier General Geum, Major Song. Dislikes: Anyone bothering Mari, hellish training.

A flying robot that Mari Geum rides. Cannot speak.