Do you think Miss Corvier is supernatural or a normal but disturbed human?

Miss Corvier is a supernatural being of some kind. A normal human could eat raw meat, and she never shows any hint of powers or unnatural strength, but she does somehow manage to keep the cat alive despite being half eaten. This suggests that she is not entirely human and has some kind of supernatural influence over things. This might also be why she manages to persuade Eddie to let her eat him. Miss Corvier also begins the story as an old woman and ends as a beautiful young woman. This suggests that eating other things sustains her and makes her young again. This would suggest that she is some kind of combination of vampire and ghoul.