Fiora is a powerful fighter and she got a good amount of power ups in Xenoblade Chronicles. That being said, she isn’t quite ready to take on the mastermind known as Aizen. Not just yet anyway. Aizen will still be able to speedblitz all day without any effort needed and his power is through the roof. There is nothing within the Xenoblade verse that would be able to overtake him. Aizen wins.