Fenrir Greyback is a werewolf who is involved with the Death Eaters. He works alongside Lord Voldemort because Lord Voldemort promises fairness to werewolves around the country. He does not carry the Dark Mark as he is not a Death Eater. He is greatly feared throughout the wizarding world. To fulfil his agenda of creating as many werewolves as possible, Greyback has infected scores of people including the young Remus Lupin. Unlike most werewolves, Greyback thirsts for blood even in his human form. He is also an antagonist of A Very Potter Senior Year, and sings in the song, This is the End.