User blog comment:IamJakuhoRaikoben/Chapter 428: If Our Paths are Different, Review./@comment-4933386-20150413143501

I am really not sure whether Gray is evil or not... He does seem to have his conscience and all, and desired to kill END and I assume Zeref as well. He still act normal (you know what I mean)...

I feel like he is consumed by his hatred(?) towards END than by the ice devil slayer curse.