Anything blood-related will do; if not, then just make it gothic enough to be a vampireesque name, so don't hold back. (I'm open to all suggestions.)
For more context: She likes to shapeshift into a cat because it's her favourite animal, and as a Dhampir, she's fine with just eating normal human food but only drinks blood when it's necessary or needed; she doesn't care about what's right or wrong, so she doesn't have a problem killing someone. I wouldn't describe her as a kind or evil person, so maybe the closest thing would be an antihero or antivillain.
Every name that you all suggested will be listed(I always take notes), and sometimes I'll reply to your comment when I can.