1x02 of Merlin gave me an AU idea
Kara fighting to win the tournament just to escort lady Lena to the feast.
Lena is annoyed that her parents are practically selling her to some gross dudes, but then one of them wins and takes of their helmet it’s actually a really cute blonde lady knight. King Luthor says that it was against the rules, but since she won and he keeps his word, she can have the gold. But lady Kara refuses the gold and says “You can keep the gold. I want the other thing that you promised.”
“And what is that?”
“To escort the beautiful lady Lena to the feast. Of course, only if the lady agrees.” And the lady sure does agree.