User blog comment:Miskos3/Fairy Tail 2018 + FINAL CHAPTER Review/@comment-24053170-20170724210758

Since both Mavis and Zeref were reincarnated, that means that both of them can actually grow older. As they no longer have the immortality curse from Anhkseram.

So I wonder what they would look in their older years?

Also Arius looks much younger now, compared to how he looked in his previous incarnation as Zeref. In fact he looks even more like a child then Mavis did....