User blog comment:IamJakuhoRaikoben/Chapter 464: Natsu vs Zeref, Review./@comment-7405046-20151130193757

My theory about Layla helping with an Eclipse Gate to bring Natsu (and other DS's?) from 400 years ago into the present seems to be in good health. Great. I'm guessing Anna is related to Yukino and Sorano and had the golden keys that Layla didn't. Either that or she's related to Brandish.