User blog comment:IamJakuhoRaikoben/Chapter 377 & 378: Imperial Wrath of the Heavenly Dragon & With Friends, Always, Review./@comment-2214433-20140330153158/@comment-2214433-20140330161032

Nope. One of the volume afterword mentioned that Mavis wasn't even supposed to appear again after Tenrou, but since she was popular, Mashima inserted her into GMG.