Leon

You were a princess and future Queen of the Dark Kingdom, your mother died in childbirth. Your father loved you more than anything in the world and protected you, but since you were the future Queen, you were taught the rules, but you hated rules and all that, but you always wanted to be queen. You also couldn't control and manage your magic, which sometimes caused deaths.
Leon is the prince and future king of the Light Kingdom. His mother and father were the Queen and King, and his parents loved him dearly and taught him to be a good prince. Unlike you, he loved and always followed the rules, and knew how to control and manipulate magic.
The Kingdom of Darkness and the Kingdom of Light were at odds and they had a war that lasted for many years, but it so happened that you met Leon at the border and quickly became friends, he and you were not afraid of each other and were friends, he taught you how to be a princess, but you just brushed it off, and you told him stories about the kingdom
Here is another day and you were walking with Leon