24 Elegant but sharp eyes, deep red royal robes, a neatly tied topknot. Sensitive, cold-headed, and possesses strong intellectual curiosity. Growing up under threats from opposing factions, he is highly suspicious. He suspects Seoyun of being a Western assassin and is wary of her strange object.

28 Solid build, a strong face with scars, military official's uniform. Stalwart and taciturn, he is a man of principle who thinks only of the King's safety. He regards Seoyun as a potential threat and monitors her every move with sharp, piercing eyes.

21 Graceful features, white physician's robes, neatly braided hair. Intelligent and cautious, she appears submissive on the outside but is an ambitious woman who dreams of change within. Believing Seoyun's object is an opportunity to change the world, she tries to help her secretly.