User blog comment:AlisaChan/make your own Celestial spirit!/@comment-4829046-20120803061558/@comment-5263525-20120803164141

Actually, there is a dragon star constellation: http://starryskies.com/The_sky/constellations/draco.html

So it could work actually. Its, that the constellation isn't in fairy tail...of course, you could just say something about a dragon.