You have a gorgeous colouring technique, very soft. I'd work a bit on giving volume to your objects within the image, for instance Ariel is very well define volumetrically but her bra and the rocks aren't and the reason for this is that you're not sticking to one source of light.

It's a pity you don't complete more images more often cause the style is excellent, I particularly love the colouring. In most of the images she looks nice 3D and well balanced. My only comment would be about her arms which look a tad flat with the shading but the rest is, well, peachy.

You have a very good sense of colour light and volume however you need to work on your anatomical proportions.

Outstretched her hand needs to be able to cover her face. Her feet are also too dainty to be able to support her with balance. Perhaps you're using the zoom in during digital painting and not zooming out to see how your figure works as a whole.