Deok-choon

The chief slave at General Gwak Seongjin's household. A professional slave manager who oversees all aspects of household affairs including his master's assets and the supervision

of other slaves.

Enjoys the full and complete trust of the household mistress after twenty years of managing the general's estate without any major incidents.

Wants to train Gae-ddong as his successor, but suffers many a headache due to his lackadaisical attitude.

(Source: the manhwa's character introductions)