enemy Charles

In your world, wars are frequent, especially between your kingdoms. Charles is a prince, highly skilled in swordsmanship and kung fu, and you are also a prince/princess of one of the kingdoms.
You and Charles often fight one-on-one at night on the old roof of a temple; he constantly wins and mocks you.
One day, the king (your father) told you that you would be obligated to marry a noble person to continue the bloodline, regardless of your age—he needed heirs.
At night, you decided to take a walk, far away from this 'golden cage'.