User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-120.28.48.210-20140603055640

I have a theory that E.N.D. is Natsu. He has this connection with Zeref as if they have known each other for a long time. Also, Zeref said that Igneel tried but couldn't kill E.N.D. and I think it is because he started to care for Natsu. Also, Zeref asked whether it was Natsu or E.N.D who will meet him, so I am assuming he was referring to which personality of Natsu will that be. With this, I don't think E.N.D is Tartarus' guild master.