User blog comment:Bluefox87/Chapter 416 Natsu is E.N.D...WHAT?!?/@comment-76.121.234.236-20150124114938/@comment-7418318-20150124115357

"Natsu was likely created by Zeref so he could one day destroy his creator." that's all we know and even that little we don't know for sure yet. I don't think that's worth putting there until we learn more.