[Alex]

That was the obvious conclusion I came up with early on before going a bit more off with a secondary possibility.

Spoiler:

The covering of the wrists certainly suggested earlier suicide attempt but covering the neck too let me to suspect that maybe it would turn out she was a vampire of some sort and therefore had stopped aging physically and the chokers were hiding the bite marks from when she was turned.

Silly, yes, but the genre is silly. Good performance from the girl, though.