This is really gorgeous. I really like the warm/sensual colors of the girl, shadowed by the cold/ephemeral colors of her "ghost". The piece reminds me of the subtle (or astral) body of the occult, being chained (wrapped, confined) by the senses of the physical body. Maybe it's just me, but it seems to be a reference to the alchemical arts.
Aesthetically, it's just beautiful. The slight, unfinished breast and the details of both faces are very nice. I really like this one.