Percy's never been a fighter, so it's very probable he'll get caught. He can help with an escape, but not be able to get out himself. He could sacrifice himself for Eve so she can run or something.
I still want a Uriel vs. Mordred, so I'll poke Jill for that. Following that if it should happen, he can encounter Tristan? I imagine he probably won't stand up too well to Mordred shslshjsl but he'll try his best.