User blog comment:Renkrisb/The Dragneel Brothers/@comment-26416024-20150519215248/@comment-1776824-20150525044747

You're arguing virtually the same points as me. There is something special about END: his growth potential. It wouldn't make much sense for Natsu to have an Etherious form considering his body is completely human, and that his life force alone was recreated with ether. END is indeed the strongest demon for what he will become, not because of what he currently was or is. God-Natsu is current example.