Avenged (Avengers + Loki love story)'UP FOR ADOPTION'

The Avengers along with a 'rehabilitated' Loki run into a problem when people are found dead in alleys in New York. The cause of death is blood loss, but there is no blood at the scenes and also no wounds that would associate with the cause of death. No one knows what is going on until Tony finds something interesting....something, or should I say someONE that all the victims have in common.
A girl with ink black hair, cat-like blue-green eyes, pale flawless skin, a frail body build, 5'4", and shy personality. He also finds out she has more in common with the dead bodies than they previously thought. What does this girl have to do with the deaths in New York? Read and find out.

I do not own the Avengers or Loki, I do however own my ocs.