Fenrir Greyback is one of the Blind Bag characters in LEGO Dimensions 2: The Rise of Enoch, from the Harry Potter franchise.
Greyback, unlike other werewolves, is savage on bloodthirsty, even biting humans in the day without the full moon. He bit Remus Lupin when he was a child and was therefore responsible for Lupin's transformation into a werewolf. He also attacked Bill Weasley, but not on a full moon so Bill was not completely infected.
He and a group of Snatchers kidnapped Mr. Ollivander, the wand-maker, Griphook, and Luna Lovegood in Harry Potter and the Deathly Hallows. Even though he was unofficially considered a Death Eater because he hunted down and turned in enemies of Voldemort, he never got the Dark Mark branded on his arm as he was never part of Voldemort's inner circle.
During the Battle of Hogwarts, Hermione Granger used a spell to blast him away before attacking Lavender Brown after she fell from a balcony. After that, he was hit on the head with a crystal ball from Professor Trelawney. He escaped and dueled Neville Longbottom, Ron Weasley, and another student, who eventually defeated him.