That is a pretty adorable green dragon, but I also kind of get the vibe that it's an unreliable crybaby.
I scanned around for about half-an-hour and found some resources.
(This site is excellent and has some links to other sites)
http://j-rpg.com/ryuutama/
(French list of classes, page has links to other french pages including some very long forum topics)
http://lapinmarteau.com/nos-jeux/ryuutama/voyageurs-pj/
(Linked from the first page, this has an online reader version of the game book; it's mostly japanese but there are some numbers and pictures that you may be able to decipher, or at least enjoy)
http://www.j-comi.jp/book/comic/43101
(decent summary of the game in pictures)
http://j-rpg.com/ryuutama/pictures.html
I'll probably be playing a fighting type character, probably an artisan (the concept is a butler). I look forward to what comes from everyone else.