User blog comment:IamJakuhoRaikoben/Chapter 288: Wendy vs. Chelia, Review./@comment-4438931-20120624065626/@comment-4829046-20120624070458

Nice comment. i think Mavis does have some history with Zeref. For instance why was he on her island and for some reason the anime team know this, cause in the 10th opening it showed Mavis and Zeref walking with different backgrounds and expressions, possibly hinting to something.