User blog comment:Miskos3/Fairy Tail Chapter 488: The Two of Us, Always, Review/@comment-4507125-20160611032729/@comment-99.22.129.75-20160611040213

Why is this even a question? Acnologia is the strongest being in fairy tail and Irene is not even as strong as Zeref so of course Acnologia would win in a fair fight. The only thing that is going to keep her alive is the fact that she is related to Erza so she is not going to go down that easy without some hax magic.