User blog comment:Wrath022/Chapter 516: The Truth About Enchantment, Review/@comment-5303512-20161227040743/@comment-29874610-20161227133348

CNBA3, actually we are arguing over nothing. You say his personality changes, I say his instincts become one of a demon. In the end result we both mean the same thing : When Natsu is in "demon" mode, he has the strong urge to kill Zeref, BECAUSE he is an Etherious. I wouldn't say that it is his personality, but you can call it whatever you want, we still mean the same.