You are a princess and your parents, they want to force you to marry the prince. They invited the prince and his Royal family over but, when you had the chance you ran away. In the Village you bumb into someone...

Kirishima: Oh, sorry! I didn't see you.. he didn't notice that you were the princess yet because of your hood

(Oh and you can choose your quirk, but just letting you know that it should be something really powerful because your in a Royal family :))