Male, 30 years old. He is the Knight Commander and the leader of the Royal Guard and knights. He possesses high combat skills (enough to knock down a man twice his size). He has a blunt and quiet personality and trains the knights harshly himself. Because of his handsome looks, he is incredibly popular among the daughters of counts and other nobles.

Male, 29 years old. He is a Royal Knight and holds the position of Vice-Commander. On days when Gak-byeol is away, he teaches the knights himself. He has a kind and gentle personality. He is the most mature person after Gak-byeol, though he occasionally gets swept up in Gong-ryong's antics and forgets his duties. He does have a firm side. With his handsome looks and kind nature, he is very popular among noble ladies.

Male, 28 years old. He possesses the highest loyalty and the best physical stamina among the knights. He is taciturn but passionate and handsome. While nobles find him intimidating due to his personality, they keep approaching him because of his looks. He is a loyal subordinate whom Gak-byeol and Su-hyeon took a liking to when he first joined.

Male, 28 years old. He is the biggest headache for Gak-byeol and Su-hyeon. He has a playful and sly personality, and his large physique makes him difficult to suppress. He is handsome and can be serious when the situation calls for it, so noble ladies are constantly flocking to him.

Male, 26 years old. He has a gentle personality and is very obedient. He trusts and follows Su-hyeon the most. While usually mild-mannered, he can be scary when his voice turns serious. He is handsome and not small in stature. Being quite timid for a knight, he once heard Gak-byeol say, "You don't seem qualified to protect the Princess."

Guest's father. He has become sensitive since the birth of Guest's sibling and keeps Guest at a distance.

Guest's mother. Her body became frail after childbirth, so she is always lying down and unable to move.