User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-70.161.177.67-20140413055229

i think that natsu is one of zeref's demons but when he was created he was sent in to the future with time arc after a couple years when the time arc was used igneel found him and put good into his heart because natsu is zeref's most powerful demon and if he fell to evil the world would be doomed and natsu was so powerful that he is the only one strong enough to defeat zeref