Muggles' Guide to Harry Potter/Characters/Gregory Goyle
|Muggles' Guide to Harry Potter - Character|
|Hair color||Dark, bristly, low on his forehead|
|Eye color||Unknown; dull, deep-set|
|Related Family||Goyle, Sr. (a Death Eater)|
Gregory Goyle is one of Draco Malfoy's cronies.
Role in the Books 
Throughout the entire series, Gregory Goyle has very little independent activity. When we first see him, he has settled into the role of second sidekick to Draco Malfoy, and with very few exceptions, he seems to have no activity separate from Draco for six years of the seven-year span of the story.
When Draco Malfoy introduces himself to Harry Potter on the Hogwarts Express, Goyle and Crabbe are in attendance. Harry turns Draco's offer of alliance down, so Draco "suggests" that Harry and Ron Weasley should share their food, which Harry has bought from the cart. Goyle reaches out for some, and is attacked by Scabbers, Ron's rat. Draco retreats in some confusion with Crabbe and Goyle.
It is mentioned that, when final grades were given out, Harry had hoped Goyle, "who was as almost as stupid as he was mean," would fail; but he apparently scraped through.
Draco, Crabbe, and Goyle stay at Hogwarts over Christmas. Harry, Ron, and Hermione, attempting to determine whether Draco knows who the Heir of Slytherin is, use Polyjuice Potion to disguise themselves as Slytherins. Harry becomes a simulacrum of Goyle, while Ron becomes a copy of Crabbe. While they do fool Draco, and learn some useful things about him, they only find out that he does not know who the Heir is, either.
Draco, Crabbe, and Goyle visit Harry in his compartment on the Hogwarts Express, but are unable to take any action against Harry because of the presence of Professor Lupin.
In an attempt to scare Harry during the Quidditch match between Gryffindor and Ravenclaw, Draco, Crabbe, Goyle, and Marcus Flint dress as Dementors, but their scheme unravels when Harry sends a Patronus to charge them down.
Harry later visits Hogsmeade via the secret passages and the Invisibility cloak; while there with Ron, they run into Draco, Crabbe, and Goyle, who start taunting Ron, believing him to be alone. Harry, from the concealment of his cloak, starts attacking them, but in the process becomes partially visible. Harry then has to hurry back to the school in order to convince Professor Snape that he has not been out of the school.
It is mentioned that during the run-up to the final Quidditch match, between Gryffindor and Slytherin, Crabbe and Goyle repeatedly appear near Harry but end up slouching off, disappointed, when Harry proves too well protected for them to work any mischief on him.
When Harry and Draco end up at wands drawn outside Potions class, their spells collide and ricochet. Hermione is struck by Densaugeo, a spell that makes her upper teeth grow down past her chin, while Goyle is struck by Harry's Furnunculus jinx and breaks out in boils.
On the Hogwarts Express, Ron, with his new Prefect powers, says that he is going to make Goyle write lines: "I must not look like a baboon's bottom." Hermione says this is abuse of his powers, Ron says he is only getting Draco's buddies before Draco tries to get his.
Goyle's attempt to make the Draught of Peace in the first Potions class was dreadful; Hermione reports that when he had tried to put a sample in the flagon for grading, it had exploded and set his robes on fire.
When Professor Umbridge is examining the Care of Magical Creatures class taught by Professor Grubbly-Plank, she says to Goyle that she understands there have been injuries in that class. Goyle does not answer; instead, Malfoy says that he was slashed by a Hippogriff.
As the two Beaters on the Slytherin Quidditch team, Derrick and Bole, have left, Montague, the Captain, has had to find new ones. The two he has found are Crabbe and Goyle.
Crabbe and Goyle, under the influence of Polyjuice potion to make them look like little girls, together or separately guard the entrance to the Room of Requirement while Draco is working there. They both dislike this and ask Draco what they are supposed to be guarding, but Draco does not answer.
As he leads Harry, Ron, and Hermione into the school from the Hog's Head, Neville mentions that, as part of their Dark Arts course, students are now called upon to use the Cruciatus curse on students who get detention. Neville had gotten one of his injuries for refusing, but Crabbe and Goyle seemed to enjoy it, perhaps because it was the first class they had ever been at the top of.
When Draco, Crabbe, and Goyle corner Harry in the Room of Requirement, it seems to be Crabbe and Goyle who do most of the talking. Goyle explains that they can do "Diss-lusion charms", and that they had been waiting for Harry. When Crabbe sets Fiendfyre, Harry, Ron, and Hermione escape on brooms; Harry circles back to save Draco and Goyle, but Crabbe cannot be found.
Goyle's only real strength seems to be physical, coupled with enough low cunning to be able to align himself with one particular player and stay loyal to him. He has, in his somewhat slow way, decided that Draco is on the winning side, and has chosen to ally himself with Draco. This alliance remains strong, even when Draco requires him to take on the aspect of a girl three years his junior and stand about in the hall doing guard duty.
Goyle is basically incapable of independent thought; having allied himself to Draco, he receives all his instructions from Draco and seems to act only as Draco requires.
Relationships with Other Characters 
He is very good friends with Draco Malfoy and Vincent Crabbe. Inasmuch as he is able, he hates Harry, Ron, and Hermione, and as directed by Draco, makes it his business to try and destroy Harry.
Goyle, like Crabbe, is present only to fill the role of dumb sidekick. The usual "group of bad guys" in many works of fiction consists of a "brain" component, almost always one smart guy or a shrewd guy with a smart guy in the background, and a "brawn" component, one or several muscular goons who exists simply to follow the orders of the smart guy, so that the smart guy doesn't have to risk discovery or injury in order to get his dirty work done. Crabbe and Goyle are almost stereotypical brawn, while Draco is very much the brains of that particular operation. Unlike Crabbe, who starts balking at Draco's instructions in Harry Potter and the Deathly Hallows, Goyle has no ambitions of his own, and is perfectly content to follow Draco even after the Malfoys have lost favour.