Will try and provide a descent description, later.
The part with her eyes has to do with her being typically blind. However, during the night her vision is practically blurred.
Although she's blind, she actually relies on her Sonokinesis to gain her bearings, unlike a bat's echolocation. She's also skilled in fencing.
A vampire bat she originally is; but this, however, doesn't mean she's a real vampire as she's not skeptical to such mythical lore relating to vampires (meaning if she bit you, you don't however, become a vampire and all that related whatnot). Although, she does have a craving for black pudding, though.