This is my favorite of the series that you've done. It is my favorite for the style in the lineart like the length of the ears the length of the whites around the eyes, the hues in the wrinkles of the toes. the position of the character to match that of the top heirglyph in the symbol... just totally awesome. The others have many of those same things, but the lineart here and the sharp edges of the colors are very attractive! Very well done!
My senior thesis is due in a month and a half, so personal art projects have been more or less shelved except for smaller, quick things. It probably won't be finished until April/May (same w/ the koi water symbol variant).
The water one is half-done (I used a polar bear dog as the animal, not the koi) and will probably stay that way until my thesis is over. Air is just a sketch b/c Appa is proving more difficult to integrate w/ the air symbol, but I'll persevere! Eventually the set will be complete.