I thought this kind of went in line with Halloween. Residing in the Chamber of Delusion, this ethereal being floats gracefully within its walls, possessesing a cold, chilling beauty. Which is kinda offset by her floaty "omg where bees my legs" -ness, and the extra set of demonic arms growing out of her back that dwarf her regular, slender ones and look to be very grabby. And not in the good way.
She has a haunting sort of demeanor to her, it both captivates and frightens. She seems to exemplify the very spirit of Halloween - she scares you, but not so much that you don't want more.