Leo Aiolia may always be in Aiolos’ shadow to an extent, but his power is still comparable to even the best of the Gold Saints. Azalie won’t be able to stop him. While her sword can theoretically turn anyone into a dragon with a single slice, she is not fast enough to hit Leo with it and I have doubts if it could also do that when he is protected by the cosmos. Either way Aiolia is just on a different level here and won’t be doing down easy. Leo Aiolia wins.