User blog comment:Miskos3/Fairy Tail Chapter 486: The Fourth Guest, Review/@comment-24277053-20160523141935/@comment-24277053-20160523143352

I was thinking the same thing, and who knows perhaps Acnologia played a role on Eileen and Erza separation, heck she might think Acnologia killed Erza her daughter / sister, we don't know the nature of their relationship yet.