User blog comment:FairyRaven/Fairy Tail Chapter 324: The One Who Closes The Door, Review and Commentary/@comment-112.205.41.120-20130323032321/@comment-6146666-20130323224933

I kind of like Zerefs character so I'm still hoping he can control his evil and whatnot. If lullaby and Delliora are still around hundreds of years later I'm sure other random demons can be activated without Zerefs help. Lullaby was a flute that could be easily concealed and activated so I'm sure there's others like it.

And for Hades' demons, all I can say is too each his own lol I can't go one way or another on that. I don't remember them going too much into it.