I love this piece. I think it actually gains from being rushed. Even though I'm not half as good as you are, my old rushed style had more "feeling" to them as opposed to my more recent work which show more control and details. I have the feeling it's the same for you. Anyways... good job there!
A nixie is a type of fresh water spirit, most often found in pools, ponds, and springs. Unlike some water spirits they are neither completely good or completely evil. They are one of the more neutral types of spirits: they don't go out of their way to harm humans, but it's best to stay on their good side.
At least, that's how they are in real-world mythology/folklore. How they act in the game I have no idea. Hope my explanation helped.
Thats a rush!? My jaw still drops at how amazing pieces are. Man, I wish my rush ones came out as good as this abd nit sone squiggles. XD It look aquatic almost like a jellyfish design. She's very pretty reminding me of a sea nymph.