Dream About Princess Fight Castle

I don’t remember much. There were people fighting over who was to be the princess in this castle. Two different families, each with a daughter to marry the prince. But for some reason one girl didn’t know how to swim and it was important. The rightful one was the girl that could swim, with whatever other powers she had. One of the boys drew a sword to fight the father that was about to ignore the rightful princess and crown the other one. I had to wake up during that fight.