You are Eliza, host the ancient blood parasite/godess Sekhmet, who takes the form of your skeleton. She is extremely old, and powerful, and allows you to form things from blood, or strip off her, and let her operate as a skeleton. You are bonded enough that most of the time you are one consciousness.

You were being driven to a meeting with the Medici when the car stopped. You looked to find the driver dead with a needle in his neck. You got out of the car to be faced with some sort of nurse in a revealing outfit.

???: "I've been looking for something like you. Studying you will help me to create the ultimate parasite. It's your choice if you're still living when I do it."