User blog comment:FairyRaven/Fairy Tail Chapter 465: 400 Years, Review and Commentary/@comment-5668006-20151209011004

Anyone else remember that early on in FT all of Natsu's opponents would refer to him as a "demon."(crazy foreshadowing) Mash had this in his head the whole time to have Natsu be a demon it seems. His original artwork was with horns after all