Shortly after the Death Eater take-over of the Ministry of Magic, they conducted a raid on the Hogwarts Express. They raided the train in order to capture Harry Potter, who had been branded as Undesirable No. 1.
Why did the Death Eaters attack Harry on the train?
The dementors attacked Harry Potter on the train because he was a better source of the energy they require than Sirius Black, who they were actually searching for [1]. Additionally, Harry's reaction to the dementors was particularly strong, making him an easier target for them [3].
Why does Harry get attacked by a Dementor on the train?
Harry is targeted, not because he is Harry, but because he is, to Dementors, a better source of the energy they require than Sirius. Barty is attacked only because he is helpless and a suitable energy source (and perhaps on account of Fudge's personal order, which a Dementor would obviously not resist).
He was that time rescued by Dumbledore, who slowed Harry's fall and then drove the Dementors away with a Patronus. They seemed to be particularly attracted to Harry because, due to his miserable childhood and many bad memories, he was particularly vulnerable to their influence.
The scream he heard was his mother's as she was killed by Voldemort. This was his worst memory and the dementor latched onto it. Harry then fainted. A little later he learns how to fight them off though so he is okay.
The HIDDEN Truth Behind Harry's Dementor Attack - Harry Potter Theory
Was Harry's Scream real when Sirius died?
When Sirius dies (Order of the Phoenix), Daniel Radcliffe, as Harry, screams, but in the movie it's muted. Dan's grandmother had died that same day, so the scream was as real as could be, so real that it made Emma Watson (Hermoine Granger) and Helena Bonham Carter (Bellatrix Lestrange) cry.
What did Dudley see when the Dementors attacked him?
Dudley was on the ground with the Dementor atop him. While under the influence of the Dementors, Dudley saw himself for what he really was — a cruel bully. Unable to defend himself, the Dementor was lowering its head and nearly kissed him.
Due to the harrowing experiences he had during his time with the Death Eaters and his remorse over his criminal acts as a Death Eater, Draco had realised the error in his ways and thus abandoned the old pure-blood beliefs he was raised to adopt and believe in.
Lord Voldemort charged Draco with making up for Lucius's failure, and he became a Death Eater at age sixteen but was quickly disillusioned with the lifestyle.
The "most faithful servant" is Barty Crouch Jr., who has already been in place at Hogwarts working for Voldemort. The three dead include Evan Rosier, Wilkes, and Regulus Black.
Harry describes Umbridge to Sirius Black, saying that she's vile enough to be a Death Eater, despite not being one. Umbridge is also depicted to be a prejudiced person, despising half-breeds and Muggle-born witches and wizards to the point of firing Hagrid due to his half-giant birth status.
Dumbledore's lack of belief that Sirius is innocent is also suspect. Sirius was a member of the Order of the Phoenix which fought against Death Eaters, but Sirius also was as close to James as a brother, the Potters even took him in when he ran away from home.
With Harry and Hermione despondent after the events in Godric's Hollow and Ron trying desperately to find his way back to them, it was Snape's Patronus – the Silver Doe that was somehow familiar to Harry, perhaps because it recalled his mother's own Patronus – that brought them back together.
How did the Death Eaters know when Harry was being moved?
At Malfoy Manor, Snape tells Voldemort the date that Harry's friends are planning to move him from the house on Privet Drive to a new safe location, so that Voldemort can capture Harry en route.
By June 1996, all of the Dementors of Azkaban collectively rebelled against their employers to join Lord Voldemort, who offered them more victims and free rein across the country. This aided the 1996 and 1997 escapes of Death Eaters from Azkaban.
He joined the Death Eaters, who shared his views on blood purity, and participated in the First Wizarding War, becoming Voldemort's second-in-command. However, he was replaced by Bellatrix Lestrange in the Second Wizarding War.
J.K. Rowling says Draco doesn't have a patronus because he never learned the spell but I think it's because he doesn't have any powerful happy memories to use.
Draco Malfoy is branded with the Dark Mark and formally made a Death Eater. This initiation ceremony was the ritual in which Draco Malfoy was branded with the Dark Mark and, consequently, was regarded as a Death Eater.
J. K. Rowling stated that Narcissa Malfoy was not a Death Eater, but merely agreed with the philosophy of blood purity. Why she never became a Death Eater is unknown, but it is most likely this was because of her overwhelming love, loyalty and commitment to her family above anything else.
Petunia never showed any love and affection at all towards Harry because he reminded her of Lily and the wizarding world. She treated him as a waste of space, giving him the cupboard under the stairs at first and making him do all the chores. She, along with Vernon, ignored most of Harry's birthdays.
On 31 July 1991, Rubeus Hagrid, despite being forbidden to perform magic, attempted to transfigure Dudley Dursley into a pig, after his father Vernon Dursley had crudely insulted Albus Dumbledore at the Hut-on-the-Rock, but only managed to give him a tail.
Harry was the most outspoken, which often landed him in trouble. She steadfastly stuck to the Ministry line that Voldemort had not returned and that Harry Potter's claims were only to get attention for himself.
