User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-90.221.52.199-20140316214948

Theory 1: If humans can turn into dragons, then why can't it be the other way round, natsu could be a dragon, and (for some reason) have memory loss, that's why zeref knows him? Theory 2: zeref could be Natsu's father, as igneel isn't his biological father? Theory 3: the reason igneel couldn't kill e.n.d is because natsu is e.n.d, and he might not have awoken yet that's why he doesn't remember he's e.n.d? Theory 4: maybe when natsu was a baby and found by igneel, igneel knew zeref and therefore natsu could have met zeref when he was a baby which is why zeref says that Natsu's grown up? These are just guesses by the way ;)