User blog comment:FairyRaven/Fairy Tail Chapter 471: Until the Battle is Done, Review and Commentary/@comment-24277053-20160201152033/@comment-1776824-20160201152323

In my opinion, to be a traitor, you needed to have loyalty in the first place. God Serena clearly never thought anything of his homeland or the Ten Wizard Saints. From the start, his only interest was Acnologia. The Wizard Saints were just a means to an end for him.