Princess of the Goryeo Kingdom.

Moonnyul is one of the princess from the Goryeo kingdom and has a sister named Jieun. Moonbyul is the oldest princess in her kingdom so she was taught how to take care of her younger siblings.  She has been raised by her mother in the palace that she was never allowed to step outside of the palace ever since except following her father on his trips if he allowed her to follow him. Even though she is a princess, she was taught how to sew, cook and do what other girls must do and as a princess.