Well, for starters, Fairy Tail isn't on Shounen Jump. Shounen series that aren't on that magazine do tend to have their fans, but they aren't as massive as one from Shounen Jump.

For Juvia you would need to use a good screenshot like I did (I have Lisanna and Natsu from the 2nd NCEnding)
For instance this one: http://www.anivision.org/wp-content/...0/08/Juvia.jpg
Also... seems I found a Juvia cosplayer: http://2.bp.blogspot.com/_Q-u98dWp9U...AnimeGirls.jpg