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I could do you for afters, Dumbledore...
~ Greyback to Professor Dumbledore atop the tower, implying that he's already eaten someone shortly before.
Reckon she'll let me have a bit of the girl when she's finished with her? I'd say I'll get a bite or two, wouldn't you, ginger?
~ Greyback to Ron Weasley regarding Hermione Granger.
He doesn't have the stomach--just like his father. Let me kill him in my own way.
~ Greyback mocking Draco moments before Dumbledore's death.

Fenrir Greyback is a supporting antagonist in the Harry Potter franchise, serves as a supporting antagonist of both the Half-Blood Prince and Deathly Hallows (appearing in both Part 1 and 2), and as the main antagonist of the Harry Potter: Hogwarts Mystery side quest 'Hallowe'en Feast'.

He is a sadistic Werewolf who serves as a high-ranking member of the Death Eaters. His main goal was to lead and unite every Werewolf in a violent and feral lifestyle, in hope of creating a world of werewolves by infecting as many people as possible with the curse of lycanthropy. He is also notorious for his unrelenting bloodlust and savagery, and is well known as a particularly violent and cannibalistic serial killer, with implied paedophilic tendencies. His is one of the most feared individuals in the British Wizarding community.

In the movies, he was played by the late Dave Legeno.


Regarded as the most savage werewolf of his time. Fenrir Greyback relished in animalistic cruelty and gained an unhealthy liking for his own wolfish traits, to the point where his human form gained a more savage and wolfish appearance. Having forsaken his humanity long ago, Fenrir's savagery was next to none, and he would very often position werewolf attacks with malicious intent. While he was hell-bent on getting revenge against the wizarding-kind for the horrid prejudice against werewolves, Greyback took this to a whole other level by purposefully infecting others with lycanthropy (especially children) so they would grow to hate the wizarding world. Fenrir also gained some cannibalistic tendencies even when he wasn't in his werewolf form, a feat of inhumanity that even managed to disgust Albus Dumbledore.

Greyback was a predator in both animalistic and sexual terms, as he spoke to Hermione Granger with a mix of sexual and cannibalistic undertones. This, combined with his fondness for biting and attacking children, indicated that Fenrir might have had paedophilic interests, although this is of course never proven. According to Dumbledore, Greyback boasted of what he did to his followers, which shows that he has a sense of pride towards his atrocities. While he was never branded an official Death Eater, he had no qualm in serving as a weapon for Lord Voldemort and his Death Eaters in exchange for victims.

Despite being a ferocious killer who was feared by many, Fenrir Greyback also had a sense of fear when it came to those more powerful than him. This is shown when he cowed away from Severus Snape when the latter arrived to kill Dumbledore. In the video game Hogwarts Mystery, Greyback was ready to maul and kill the protagonist, but fled in fear after catching Dumbledore's scent.



Almost nothing is known about Greyback's past and how he came to be who he is. While he was most certainly bitten and infected with lycanthropy, how he turned into the barbaric and insane monster he would come to be known as remains completely unknown.

Fenrir Greyback was in the First Wizarding War and was a ruthless werewolf who took no remorse in killing. He was either infected as a youth or during his childhood. Unlike other werewolves, he showed a delight in transforming, going as far as to express lupine tendencies and aggression in his human form.

During the First Wizarding War, he was convicted of killing Muggle children, and brought before the Ministry for a trial. However, Greyback passed himself off as a homeless Muggle man who claimed to be astonished at being in front of a congregation of wizards and horrified by the child killings. Given Greyback's stale smell and scruffy appearance, the court almost believed his homeless story, until Lyall Lupin, Remus Lupin's father, who was a court martial at the time, noticed the signs of Lycanthrophy in Greyback's face. He noted the pallour that set in during full Moon (coincidentally, it was going to be a full Moon the next day) and Lyall said how Werewolves were brutal monsters who should all be executed. Lyall was heard by Greyback, who was enraged, and by the other ministers, who said Lyall should be rounding up centaurs instead. However, Lyall demonstrated Greyback's lycanthropy to the whole court, and Greyback yelled he would make Lyall pay as he was thrown back outside.

A few days later, Greyback found the Lupin home, broke into young Remus' room, and bit him as he slept. He thus paid Lyall back and gave Lyall a werewolf to live with. Lyall tried to find a cure for Remus, but none worked. He eventually learned to put up with the affliction and stress of the infection his son had.

During the Second Wizarding War

During Draco Malfoy's sixth year at Hogwarts, Greyback appeared at Hogwarts thanks to the Vanishing Cabinet in the Room of Requirement, whose other entrance was located at the shop Borgin & Burkes from the Diagon Alley. He was present with the other Death Eaters on the Astronomy Tower when Albus Dumbledore was murdered by Severus Snape and thrown off the tower. During the Battle of the Astronomy Tower, Greyback also also set Hagrid's hut on fire with Bellatrix Lestrange, allowing Snape to defeat Harry Potter and escape victorious.

One year later, Greyback helped the Snatchers, led by Scabior, to catch Harry, Ron and Hermione and brought them to the Malfoy Manor, home of Lucius Malfoy. He, along with Scabior, became furious when the Malfoys tried to hand the trio to Voldemort like they did all the work, but he decided to remain silent for his own good. He was later chased away out of the Manor by Bellatrix, but Bellatrix committed a great error when she did so, because without Greyback, the trio were able to escape with Dobby from the Death Eaters, although Dobby was fatally stabbed. Thus, Greyback was saved from being punished by his master when he arrived.

Following Harry Potter and his friends' infiltration in Hogwarts, Greyback came along the other Death Eaters and werewolves to participate in what became the Battle of Hogwarts. When student Lavender Brown fell from a balcony, Greyback attacked her, fatally injuring her. Hermione Granger, however, arrived with Harry and Ron Weasley. Upon seeing what Greyback did, Granger blasted him and Greyback fell out from a window of the Viaduct Courtyard. It's completely unknown if Greyback survived the fall or not, but if he survived it, he was most likely arrested and sent to Azkaban following the end of the war. In the film version, he died after being blasted onto the cliffs by Hermione Granger with a blasting curse, as revenge for murdering Lavender Brown.



  • Ironically, despite being the most savage werewolf in the Harry Potter franchise, Fenrir Greyback is never seen as a werewolf in the books, movies or video games.


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Death Eaters
Lord Voldemort | Severus Snape | Draco Malfoy | Lucius Malfoy | Peter Pettigrew | Barty Crouch Jr. (Warner Bros.) | Bellatrix Lestrange | Corban Yaxley | Alecto Carrow | Amycus Carrow | Antonin Dolohov | Augustus Rookwood | Walden Macnair | Thorfinn Rowle | Evan Rosier | Cedric Diggory | Fenrir Greyback | Stan Shunpike | Avery II

Death Eater Supporters
Quirinus Quirrell | Dolores Umbridge | Snatchers (Scabior) | Gregory Goyle | Vincent Crabbe | John Dawlish | Kreacher

Muggle-Born Registration Commission
Dolores Umbridge | Corban Yaxley | Albert Runcorn | Mafalda Hopkirk

Gellert Grindelwald's Alliance
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New Salem Philanthropic Society
Mary Lou Barebone | Credence Barebone

Basilisk | Acromantula (Aragog & Acromantula Colony) | Dementors | Centaurs | Giants | Inferi | Nagini | Mountain Troll | Gnarlak

Tales of Beedle the Bard
Charlatan | Death | Warlock

The Dursleys | Marge Dursley