Park Shin Hye -- The very beautiful princess.. Many prince are asking for her hand in marriage. Park Yoo Chun -- Shin Hye's younger brother.  Boyfriend of Krystal. Jung Yong Hwa -- The prince, princesses all over the land are hoping for him to visit and ask their hand in marriage Jung Krystal -- Yong Hwa's younger sister. Girlfriend of YooChun Seohyun -- The archenemy of Shin Hye. Has a crush on  YongHwa