User blog comment:IamJakuhoRaikoben/Chapter 484: The Monstrous Six, Review./@comment-24536822-20160512074703/@comment-7418318-20160512125818

Because there's nothing to talk about. We know there's this story and if it ever happened at all, it did so in a place where Acnologia passed by centuries later... not much to talk about or connect with each other.

I guess we could go waaaay of the rails and say that the black and white angels are representations of Acnologia's good and evil sides and rather than actual beings fighting over who could be together with the man, it described the internal struggle of those two sides trying to pull Acnologia toward either side, with the evil side ultimately triumphing.