Ooooh, spooky. Luv the thrill of this! ;)

This is pretty good so far! The main thing about your story that I would fix is that you say her name very often. Personally, I have a problem of saying 'he' or 'she' too often, but you say her name a little too often. It's probably just the one spot at the top of the story ("... Pricking at Aniya's nerves, repeating every few seconds. Aniya's breath...") and it threw me off, making me see her name more prominently, but it bothered me. Sorry for the long criticism. Keep writing!

I like the idea, and it was super intriguing! Some things could be clearer, but for a first draft, It's pretty amazing. I just have so many questions about the main character that I don't have answers to yet because there isn't more of this story.
So yeah. Keep writing.