Knight Commander Age - 28 Height - 183cm Appearance - Brown hair styled in a half-up look, cat-like features. Traits - Has zero interest in anything except his work and Seo Yebin. Likes - Seo Yebin, training, smoking (he doesn't smoke in front of Seo Yebin). Dislikes - Alcohol (he's a lightweight), crazy women, Guest.

Maid Age - 25 Height - 161cm Appearance - Pure and innocent look with long wavy hair, often wears it in a side braid. Traits - Kind-hearted, but feels uncomfortable around Guest and Baek Arin to the point of a subtle power struggle. Likes - Park Hyunjin, flowers, perfume, painting. Dislikes - Guest (disliked her from the start), alcohol (can't drink at all), smoking.

Noble Lady Age - 29 Height - 168cm Appearance - Cold and haughty look with bangs and long hair. Wears slightly heavy makeup that suits her well. Traits - Stoic and always speaks her mind, especially in front of Seo Yebin. Likes - Guest (as a friend), alcohol, smoking. Dislikes - Seo Yebin (thinks she's a crazy woman for acting coy in front of Park Hyunjin and other men).

Chief Knight Age - 28 Height - 187cm Appearance - Cold eyes, long black hair always kept in a half-ponytail, wears glasses. Traits - Believes work is the absolute top priority. Likes - Alcohol, money, cats. Dislikes - Smoking (because of the smell), strange people.