Board Thread:Spoilers!/@comment-24674051-20151007152326/@comment-1916997-20151007164019

Gwen is definitly shady (just like Arthur), but they both could just be power-hungry, and as ChocolatEyes points out, that alone does not make someone a villain. If however, they are so power-hungry that they do villainous actions to get the power, then they do become a villain. That all being said, it seemed to be implied that Gwen (and Arthur) would both go pretty far to ensure getting power, so yeah.