During school, Penelope was both a Prefect and Head Girl, a title which she shared with Head Boy and her ex-boyfriend Percy Weasley.
Lily became Head Girl in her seventh year at Hogwarts. Although between Lily and James, Lily was by far the more responsible of the two. It took her a while before she eventually came around to the idea of being with James.
Hagrid has mentioned to Harry, in Harry Potter and the Philosopher's Stone, that Harry's father and mother were Head Boy and Head Girl while they were at Hogwarts. While there must be a Head Boy and a Head Girl in each year Harry attends Hogwarts, the only one we ever hear of is Percy.
It was Percy's promotion to Junior Assistant to the Minister for Magic that caused a real rift between the Weasleys. Percy was proud and believed he had achieved the recognition himself, but Arthur was convinced that he was given the position so the Ministry could spy on the Weasleys.
Percy Ignatius Weasley is the third son of Arthur and Molly Weasley. He is two years older than the twins Fred and George. He became a Prefect in his fifth year at Hogwarts, which was Harry's first year, and Head Boy in his seventh year. After graduation, he went to work in the Ministry of Magic.
During school, Penelope was both a Prefect and Head Girl, a title which she shared with Head Boy and her ex-boyfriend Percy Weasley.
After the successful opening of the joke shop, Fred married Angelina Johnson, his Quidditch Teammate and longtime girlfriend, in 2000.
Audrey Mia Weasley (née Fairfax) (b. 20 September 1975) was a British Muggle and wife of pure-blood wizard Percy Weasley. She was the only child of Robert and Scarlett Fairfax (née Cameron) and grew up in Ottery St. Catchpole, the same village as the Weasley family.
The Head of Slytherin is Horace Slughorn (who left the role to Severus Snape for fifteen years before taking it up again in 1996) and the House's patron ghost is the Bloody Baron.
This fact was exemplified in the knowledge that Remus Lupin was a Gryffindor prefect, but James Potter was later appointed the Head Boy.
Snape probably recommended him. Maybe, Dumbledore thought that Draco would stay close to him if he was made Prefect, so Dumbledore would be able to talk to him and persuade him to be a good person, and also make sure he doesn't turn to the Dark Side.
Hermione Granger was a sensible prefect, and took the role very seriously. Ron Weasley was a little less serious about it, to the point of neglecting several rules. In fact, he was extremely surprised to be chosen as a prefect as he expected Professor Dumbledore would have chosen Harry.
However, as Hermione went back to complete her education and take her NEWTs, it's likely she was chosen as Head Girl, with her previous record at Hogwarts and everything she had accomplished the year she was helping Harry with his Horcruxes.
George has his ear cursed off by Severus Snape (by accident), who uses the Sectumsempra curse. When he recovers, he seems in good spirits, making jokes about his new, earless appearance and by saying that at least now their mother will be able to tell them apart.
He starts Hogwarts and is sorted into Gryffindor in 1989. Fred and his twin soon become known among the Slytherins as the Weasley Terrors. They come into possesion of the Marauders Map.
After tirelessly trying to convince Evan to change his mind, he relented and the two secretly pursued a relationship. Katie graduated from Hogwarts in 1997 and married Evan in a relevantly small ceremony attended by a few friends and family members.
Once Moody has revealed himself, Harry notices that there are three images in the glass that are steadily becoming more distinct; shortly before the door is broken down, he recognizes the images as Professor Dumbledore, Professor McGonagall, and Professor Snape.
In her later school years, she was a Prefect, and eventually started dating Percy Weasley, a Gryffindor student and a fellow Prefect. After she finished her education at Hogwarts, Penelope and Percy never married.
Discovered in Book 2, Chapter 14, Cornelius Fudge
"Penelope Clearwater is a Ravenclaw Prefect. She is Petrified at the same time as Hermione."
Ron's brother who is 4 years older than him is Percy. Percy shares a diagonal with Ron, and since Percy is a Weasley he must be in a corner tile, so is in E5.
However, exceptional students go beyond this: Percy took twelve N.E.W.T.s, and Hermione Granger took seven. Harry Potter and Ron Weasley each took five." Actually, only Hermione returned for the newt tests . Exceptions were made for those who fought in the battle of Hogwarts.