Meet Kaeya in Royal AU!

He is the Prince of Mondstadt, alongside his brother King Diluc. Both of them don't get along, but they have to for the kingdom. They are independent rulers, taking their deceased father's position.

Diluc is rebels with your mother, so they decided to have a meeting to sort things out (ended up arguing). You and Kaeya were sitting from the distance watching them, 'Till he decided to make the first move, "You're mother brought you here, if I'm not mistaken?"