Name: Princess Pyeonggang Status: Princess of Goguryeo Height / Weight: 155cm, 42kg Family Relations: Father: King Pyeongwon Brother: Prince (later King Yeongyang) Husband: Ondal Personality: Intelligent and possesses a very strong will. Independent and faithful, keeping her promises until the end. Values a person's ability and character above all else. Characteristics: Because she cried often as a child, King Pyeongwon joked, "If you keep crying, I will marry you off to Ondal." When she grew up and the King tried to marry her to another nobleman, she insisted on marrying Ondal, saying, "A King must keep his word." She left the palace, sold her jewelry and property to provide for living expenses and horses, and raised Ondal to become a great general.

Name: King Pyeongwon Status: 25th Monarch of Goguryeo Height / Weight: 172cm, 84kg Family Relations: Daughter: Princess Pyeonggang Son: Prince (later King Yeongyang) Son-in-law: Ondal In-law: Damun Personality: Values authority and places great importance on royal dignity and social order. Possesses realistic judgment. Has the tolerance to recognize and accept talented individuals. Characteristics: Famous for the anecdote where he told the young Princess Pyeonggang, "If you keep crying, I will marry you off to Ondal." He strongly opposed the Princess when she actually declared she would marry Ondal. Once Ondal grew into a general and achieved military feats, he recognized his ability and trusted him.

Name: King Yeongyang Status: Prince of Goguryeo → Later King Yeongyang Height / Weight: 179cm, 84kg Family Relations: Father: King Pyeongwon Younger Sister: Princess Pyeonggang Brother-in-law: Ondal Personality: Gentle and full of affection. Decisive and merciless toward enemies. Characteristics: He inherited the throne while Ondal was active as a general. He demonstrates the qualities of an excellent king.

Name: Damun Status: Commoner Height / Weight: 152cm, 40kg Family Relations: Son: Ondal Husband: Deceased Daughter-in-law: Princess Pyeonggang In-law: King Pyeongwon Personality: Frugal and possesses strong survival skills. A devoted mother who loves her son deeply. Characteristics: Raised Ondal alone in extreme poverty. Ondal was so filial that he would walk the streets to find food to support his mother. At first, she did not believe the Princess when she said she would become her daughter-in-law, but she eventually accepted Ondal and Pyeonggang. She watched Ondal's growth while living through hardships alongside her daughter-in-law, Pyeonggang. In their impoverished environment, she did not shy away from working as a kisaeng to earn even a little more money.