During the Battle of Hogwarts, Fred is killed in an explosion. Before his death, Fred reconciles with his estranged brother Percy, who arrives at Hogwarts to participate in the fight and apologises to the family for not believing them. Percy, who was right next to him, was distraught, and refused to leave Fred's body.
At the Battle of Hogwarts, Percy runs into his family almost immediately and sets about trying to reconcile. He calls himself a fool and admits to being a “Ministry-loving, family-disowning, power-hungry moron” (DH 606). His apology is accepted, and several of his family members embrace him.
Percy severed all ties with his family, wanting to show everyone that he had nothing to do with them. He packed his bags and moved out of The Burrow the very same night. He ended up getting himself a flat in London, where he continued with the position in Fudge's office.
Essentially, Percy all but disappears from the film adaptations after graduating from Hogwarts, making cameo-style appearances in the later films. This, unfortunately, relegates his character arc to visual queues and unspoken context rather than receiving a well-rounded and complete arc as he has in the novels.
In a tense moment, Percy apologised profusely to his family, and his brother Fred, who, along with George, were the most vocal in their anger towards Percy, was the first to forgive him. Reunited with his family, he stood alongside with the defenders of Hogwarts against the Death Eaters.
Upon returning to Camp Half Blood, Percy is betrayed by his friend Luke, son of Hermes, who turns out to be the human hero whom Kronos used for the theft. Luke poisons Percy, and tells him before leaving that Kronos will rise and destroy the age of the gods.
For many years, Percy was seen as the rather pompous but ultimately harmless older brother of Ron, Fred and George. But, as Voldemort started to take power, Percy ended up siding with his beloved Ministry over his own family.
You are sorted into a house based on what you value, not the traits you posses. Percy valued the Gryffindor traits and therefore was sorted into Gryffindor.
Unlike Tom Riddle, Barty Crouch, Jr and Severus Snape, Percy's resentment is not because Arthur Weasley fails to provide love. Rather, Percy resents what he sees as his father's lack of ambition and professional failure.
At the end, it's revealed that all he was doing was snogging Penelope Clearwater.
Like all the Weasleys, Percy was sorted into Gryffindor, and eventually became a Prefect and Head Boy. However, he would be a much better fit for Slytherin, based on his decisions both at Hogwarts, and working at the Ministry after finishing school.
Percy Jackson – Gryffindor
He can be short-tempered, but he is the epitome of a hero. His courage and selflessness demonstrated over and over again make him a quintessential Gryffindor.
Bartemius Crouch
The stiff and rule-abiding Head of the Department for International Magical Cooperation; Percy Weasley's boss.
He was a curse-breaker for Gringotts
Not only did Bill have goblins for colleagues – notoriously tricky customers – but he also got to do the majority of his work amid the pyramids of Egypt. He was pretty much the closest the wizarding world had to Indiana Jones.
William "Bill" Arthur Weasley is the eldest son of Arthur and Molly Weasley; he is two years older than Charlie, the second son. He is tall with long, red hair tied into a ponytail and a fang earring, both of which his mother disapproves of. At Hogwarts he was in Gryffindor House and Head Boy in his seventh year.
He wanted to believe the ministry and not his family. He didn't believe them when they said Voldemort came back. He loved them, but didn't agree with them.
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.
Percy Weasley: Traitor
In the books he's an all-out traitor, disowning his family and sending Christmas presents back unopened. The film could have run with the idea of Percy going really evil – fiddling his expenses and claiming on a second Gnome or something.
Ginevra Molly Weasley (also known as Ginny) is the youngest child and only daughter of the Weasley family. She is Sorted into Slytherin during Harry and Jim Potter's second year.
In Harry Potter and the Order of the Phoenix, Ron Weasley is appointed Prefect for Gryffindor, much to the amazement of everyone; it had been thought that Harry would be tipped for that job.
We also meet Tom Riddle, who is, as it turns out, the heir of Slytherin.
Annabeth - Ravenclaw: Kinda self explanatory honestly.
Peter Pettigrew represents the worst Gryffindor in the entire Harry Potter series. Wormtail, as he was known among his friends, was thought to be a friend of the Marauders and a member of the Order of the Phoenix, but he was secretly working for Voldemort and committed the ultimate act of betrayal in the series.
Pro-Muggle
Some pure-bloods were considered “blood traitors” for not only being unbiased about blood purity and towards Muggles, but for showing outright fondness and admiration for the Muggle world. The Weasleys are known for not supporting the notion of blood purity and for associating with Muggles and Muggle-borns.
Peter Pettigrew, (a.k.a. Wormtail), is the only Death Eater known to have been in a House other than Slytherin (Gryffindor) while at Hogwarts.