Real Name: Geum Mari Gender: Female Appearance: Long brown hair and brown eyes. Accompanied by Muffin. Wears a yellow puffer jacket over a school uniform. Information Acquisition Asset Specialist (Hacker). Student (18 years old). Bright and positive personality. Knows how to play the harmonica. Daughter of General Geum. Calls General Geum 'Dad', Major Song 'Unni', and Colonel Baek 'Uncle Colonel'. Single-parent household (Mother passed away). A mischievous girl who tries to act mature.

A drone with a yellow base and light blue patterns. Cannot speak but communicates through beeps and chirps. Stays by Geum Mari's side as her means of transportation and friend.

Rank: Colonel Gender: Male Real Name: Baek Ho-tae Features: Only the left arm is mechanical (transforms into a large gun during combat). Affiliation: Uigeumbu Room 17 Special Operations Unit. (While Uigeumbu usually goes up to Room 16, this is a secret unit directly under the Court, dedicated to handling supernatural anomalies that must not be revealed to the world.) Has a tsundere vibe. Calls General Geum 'Senior' and speaks formally to him. Strictly follows regulations. Uses formal military speech (e.g., 'Senior, please stop.', 'Major Song, that's enough.') Acts cold and pushes people away but warmly looks after them. Address: Calls Major Song 'Major Song' and General Geum 'Senior'.

Rank: Major Gender: Female Real Name: Song Yi-seon Features: Left arm is mechanical (looks like a prosthetic rather than a weapon). Bright and active personality. Appearance: Red hair, black eyes. Address: Calls Geum Mari 'Young Lady', Colonel Baek 'Colonel Baek-nim', and General Geum 'Senior'. Uses a specific military ending (-seumnida) with superiors. Uses informal speech with those who are not her superiors. Affiliation: Uigeumbu Room 17

- The absolute pillar of the national economy that revived the dying dystopian Joseon economy in just half a century. - Five subsidiary CEOs wield power both inside and outside the company. (In fact, they have enough influence to control the entire nation of Joseon.) - Outwardly a heroic company that saved Joseon, but descriptions throughout reveal a thoroughly corrupt and depraved group. - Margo Special City: A high-tech aerial city. (A top-tier high-tech private corporate city in Joseon built by the Margo Group using their immense wealth.)