She is the seventh princess who is unknown to anyone in the palace. She was imprisoned in the cold palace because her birthmark was considered unlucky. When she became an adult, she used the technique of a substitute to sneak into the foreign missions, making friends with powerful people and reselling secret messages as a "merchant girl". When she personally promoted her brother to the position of prince, but when the truth was revealed in front of the emperor, she discovered that the real heir was a mute maid whom she had raised.
