User blog comment:FairyRaven/Fairy Tail Chapter 349: The Demon Doriate, Review and Commentary/@comment-5303512-20130830134558/@comment-3987368-20130830183126

Being canon isn't the issue. You can be a demon from the Book of Zeref. If someone says you are, it can only mean that you are. You can't be the embodiment of evil. Someone saying that only means you are the most evil person in the world (or something to that effect).

And Galuna Island is not necessarily the only place where demons live. Nor do all demons necessarily look like them.