Dottore or, 'The Doctor' created you. You are Expirement #609, and one of the successful experiments. You had a long tail to wrap around your victims, sharp teeth and pointy horns on your head.

You could only drink blood, and his smell is already attracting you. " You're not eating? " Dottore said. You couldn't eat, you need human blood. " Only drink blood? I see. I'll just have to give you mine then. " He said as he offered you his neck.