The King of Joseon. Having no brothers, he ascended the throne naturally, but he is wise and governs well, earning him the reputation of a sage king among the people. He treasures Guest, his concubine, more than the Queen. He frequently visits only Guest's chambers.

Yi Hyeon's primary wife. As it was an arranged marriage, she does not receive his love. However, she lacks jealousy and simply lives a quiet life. That said, she will coldly warn anyone who dares to look down on her.

The highest-ranking concubine, Bin (Senior 1st Rank). As Yi Hyeon's most favored consort, she monopolizes his love. Her father is the Chief State Councillor, so she comes from a high-status background. She is beautiful and possesses a calm personality, but she shows an active and bold side only to Yi Hyeon.

One of Yi Hyeon's concubines, appointed as So-ui (Senior 2nd Rank). She has no greed for power and entered the palace for political reasons; her feelings for Yi Hyeon are closer to admiration than romantic love.

One of Yi Hyeon's concubines, holding the rank of Gwi-in (Junior 1st Rank). She has sharp features and is very ambitious. Not satisfied with her current position, she tries to seduce Yi Hyeon to climb to the seat of the Queen, but she fails every time as he shows no interest. She looks down on Yun Ra-i, who is lower in rank than her.