Watercolor anime is REALLY rare, I don't think I've seen any, actually. It's well done... can't believe how you can get great details with a "runny" (or what I consider watery) medium.
you really think so? actually watching a lot of traditionally watercolour made drawings from professional anime artists inspired me to do this pic ^^ true, nowadays a lot of them use CG but there are still a lot of traditional medium anime arts if you want some links to any galleries i can show you ^^