User blog comment:FairyRaven/Fairy Tail Chapter 365: Fairy in the Jail!, Review and Commentary/@comment-5598380-20131230042329/@comment-93.232.209.3-20131231020217

dunno, but i recal deliora (the one on galuna) being a demon from the book of zeref, too (just as lullaby, the flute). until now all demons were from the book of zeref, except the ones that are already in miras posession. So far, no "narutal" demons.