aragornbird: I love the pose and overall composition. As others have said, she's a bit big. In addition to scaling her down a bit, I would see if you could maybe provide a little more detail to the seam on her dress that runs up through the red eye. You might interpret there being no seam there, however, which is your artistic license. With her body turned away from the viewer slightly, you might be able to throw in one of the bow's loops emerging from the back at her waistline. Again, though, you might not be planning to add that detail. Otherwise, I can't really offer any other critiques, it looks great.
Ice-cold Claws: Sprite is looking excellent, definitely a contender for my vote. The only thing left that bothers my eye a bit is the vine. I just think it looks a bit bent where it curves in to meet her head. You seem to have enough room on the canvas to bump it out a bit more and give it a more rounded curve. The vine also appears to get larger in the middle, which is odd when that's the part that should recede backward into depth from the picture plane. As a result, the vine appears to be on the same plane as her head rather than looping backward to meet her waistline.
Quanyails: She still seems a bit like a mannequin. While I love the shape of the arms, when they're outstretched like that she seems to be a bit zombified. I might try relaxing them a bit and placing them at her sides, unless you plan to give them a more dynamic pose (like aragornbird's or ICC's). Otherwise, I think it looks good. You have one of the best vines—I like how it doesn't just protrude out vertically from her head, rather recedes immediately, drawing more attention to her face. On the backsprite, the outline of the vine where it emerges from her head is a bit thick/overstated. One more thing, I might try placing the bow (on the backsprite) a bit lower. It doesn't make sense for it to be that high, really.