Board Thread:Spoilers!/@comment-26159109-20151007195419/@comment-4427410-20151009144908

Or maybe Emma's heart is broken so she is 100% evil with no feels, I doubt it but still.

One does not have to be completely devoid of feelings in order to be 100% evil. Emotions - including love - have played a major role in people completely succumbing to evil. Look at how many characters have committed evil in the name of love or for the longing of love.