Wow, I love the tree! The textures on it and the leaves are done very well! The only thing that kind of stands out to me though is that the tree is abnormally highly detailed compared to Ginko. I know he has less details than the tree in general, but the huge contrast sort of feels a little off (maybe more of a cloth texture for his clothes?). Otherwise it is most fabulous! Nice work with the relaxed pose!
Ahhhhhhhhhhhh, wow, the more solid lines really show too, I think that this looks great~!! MAN the texture in the tree honestly just blows me away, it looks amaaaaaaazing~ And just, the look of the wispy spirits (I forgot, they're the "mushi" right...?) is terrific, too. Ahhhh this is just such a great piece!
Your coloring technique is fantastic! So many textures, which is so good for the feel of the series. The detail in the leaves are amazing, and your light sources are nice as well. It makes me so happy to see art of this quality from Mushi-shi.