I actually didn't want to fight her. The realization that Damian was the true enemy all along, and that she and her order had been unjustly slaughtering dragon knights for decades (not to mention, the Divine not being dead at all) and henceforth that her entire life had been a lie, should be revenge enough. It would probably drive her insane... and possibly drive her to become a villain in a future game.
YEP!
I think we (our main character and Rhode) both got tricked into doing our leaders and their little dirty war hehe.