User blog comment:IamJakuhoRaikoben/Chapter 366: 1000 Souls, Review./@comment-98.94.33.235-20140112004700/@comment-7418318-20140114083705

My best guess is that she'll become a Demon, but at some point during her fight against another Fairy Tail member, she regains control of herself... most likely right after beaten the FT member, but before delivering the death-strike, much like she did with Freed.