User blog comment:FairyRaven/Fairy Tail Chapter 428: When We Take Different Paths, Review and Commentary/@comment-76.121.234.236-20150415065247/@comment-7418318-20150417180736

I can see where you're coming from, though I still think it's alright.

But now that you call it a curse I can't help but wonder if that might actually be the case. Her peculiar body-structure can be a curse or a blessing depending on the situation (and mood), so I'd really like to know how it came about.

Was it natural like a magical mutation? Was it done to her (or an ancestor of her's) by someone else? If so was it done intentionally? Did she or her pregnant mother get exposed to some strange magical phenomenon which caused her condition? And so on and so forth. There are so many things we don't know about Juvia that I hope we'll get answered at some point.