I'm The Doctor. Well.... sort of. Call me a darker version, nicknamed Darkie. I was created at the beginning of The Doctor's ninth regeneration, unknown by him and anyone else.
Don't think I'm cuddly like him - or I help like him, because you're wrong. I'm not like him at all, and if you're expecting a hug, I suggest you leave. I only help when it's absolutely necessary. Other times? I'd rather just watch you suffer.
I go by The Doctor -- or Darkie. Depending on my mood. And a warning for you. Don't piss me off.