User blog comment:Imhungry4444/Fairy Tail Wikia Podcast 9/14/13/@comment-4449950-20130915134705/@comment-7418318-20130915140812

With the show-off between Mavis and Zeref a complete evil disposition is rather unlikely I think.

Tough a ruthless "the ends justify the means" stance with her fighting dirty and not shying away from atrocities to prevent the world's destruction might be interresting.