So about The Grabber in your twilight au;
Does he still kidnap Finney? Does he turn Finney into a vampire the same way he turned the other boys?
Does Robin mourn both the fact that Finney fell his victim as well as losing the ability to turn Finney himself?
He does kidnap Finn! In twilight canon, James(the grabber) lures Bella (Finn) away from safety by threatening her mother. It's similar in this, but with the Grabber threatening Gwen. When he gets ahold of Finn he whisks him away and keeps him locked up because he A. Loves to see how worked up Robin is with Finn in danger and B. Is planning to eventually turn Finn after a long, long time of torment.
By the time the ghost boys manage to track Finn down, the Grabber had already bitten him. But he bit him wrong, and it leaves Finn...well, it leaves him in a state. Robin doesn't allow this to continue but they're unable to kill the Grabber.










