Marietta Edgecombe
Biographical information

c. 1978-1979

Blood status

Half-blood or pure-blood[1]

Also known as


Physical information




Hair colour


Skin colour


Family information
Family members


Cho Chang: "Harry, I never dreamed Marietta would tell... She's a lovely person really. She just made a mistake... You know, her mum works for the Ministry, it's really difficult for her -"
Harry Potter: "Ron's dad works at the Ministry too! And in case you haven't noticed, he hasn't got 'sneak' written across his face!"
Harry Potter and Cho Chang arguing about Marietta[src]

Marietta Edgecombe was a witch who was a student at Hogwarts School of Witchcraft and Wizardry who started between 1990 and 1993. She was Sorted into Ravenclaw House and was the best friend of Cho Chang. In the 1995-1996 school year, Marietta joined Dumbledore's Army at Cho's urging, despite being reluctant to get on Dolores Umbridge's bad side. When she became afraid that her mother's job at the Ministry of Magic might be threatened by her membership in the organisation, Marietta betrayed the D.A. to Umbridge. This activated a jinx that caused boils to erupt on Marietta's face, and a Memory Charm was later placed on her in order to prevent her from fully incriminating her fellow D.A. members.


Early life

Little is known of Marietta's life before she began attending Hogwarts. It is likely that Marietta obtained her wand from Ollivander's Wand Shop before she went to Hogwarts at the age of eleven. She was born into a wizarding family, so it is assumed that she had received her Hogwarts acceptance letter by owl.

Hogwarts years

Very early years

Marietta began attending Hogwarts School of Witchcraft and Wizardry as early as 1990 and as late as 1993. She was sorted into Ravenclaw house.[2] At some point, she met Cho Chang, and became a member of her group of giggling friends. When Cho fell into a somewhat emotional wreck due to Cedric Diggory's demise, Marietta was the only one of her many friends who remained with her. Cho considered her a true friend because of this loyalty.

1995-1996 School Year

During the 1995-1996 school year, Marietta was made to attend the first meeting of what would become Dumbledore's Army in the Hog's Head pub in Hogsmeade by her friend Cho Chang through peer pressure, despite her obvious suspicion of Harry Potter's intentions as well as his claims that Lord Voldemort had returned. She gave Harry a thoroughly distrustful look to tell him that, given her way, she would not be there. She also gave Cho a disapproving look for signing the piece of parchment drawn up by Hermione Granger for all members to sign and only added her name reluctantly.

Despite Harry's extremely effective teaching methods, Marietta did not enjoy the lessons at the very least and continued to resent Harry's words, thinking of him and Albus Dumbledore as liars and nutters. She acted disrespectfully to Harry, behaviour which Cho told him to ignore. Her membership in the D.A. became particularly difficult as it increasingly came into conflict with Hogwarts High Inquisitor Dolores Umbridge, who was at Hogwarts as the representative of the Ministry of Magic where Marietta's mother worked. Even after the Death Eaters' mass breakout of Azkaban and Harry's interview being published in The Quibbler, Marietta continued to distrust Harry.

After six months of the meetings, and from the pressure her mother gave, Marietta finally betrayed Dumbledore's Army to the Ministry. After dinner, while the rest of Dumbledore's Army was learning to cast the Patronus, which everyone was eager to learn, Marietta instead went to Umbridge's office and gave her an advantageous hint about the Room of Requirement. With a little further questioning from Umbridge, Marietta confessed that a meeting was taking place there. Right after that, Marietta came to regret her decision, as the parchment she and the other members of the D.A. had signed at the first meeting was jinxed, making anyone who betrayed the organisation break out in pimples that spelled the word "SNEAK" across their face. Upon catching her face in Umbridge's mirror, Marietta decided not to show her face for shame.

As this jinx caused Marietta to cover up her face (which muffled her voice), she was unable to verbally confess everything to Cornelius Fudge. As such, Umbridge simply asked her and told her to nod. However, just before she was to confess all to Umbridge, Kingsley Shacklebolt, an Auror and a secret member of the Order of the Phoenix, took advantage of Marietta's silent shame to perform a Memory Charm on her so that she could not implicate Albus Dumbledore and Harry. The sudden change in her testimony angered Umbridge so much that the professor began shaking her violently and only stopped when Dumbledore pointed his wand at her in anger.

After Dumbledore took blame of the organisation's formation, Marietta was one of the few people who witnessed the fierce battle between Fudge's brigade and Dumbledore in the Headmaster's office. However, as she went to the hospital wing to clear up the blemishes, she was unable to give anyone a full account. Throughout her stay there, Madam Pomfrey was unable to make the slightest change in the jinx. Cho was upset for her friend and defended her to Harry Potter, saying Marietta merely made a mistake, and called Hermione's jinx a "horrible trick" while trying to persuade Harry to forgive Marietta. Harry, however, considered Marietta a traitor and her confession the ruining of the D.A. After this row, their relationship fell apart.[2]

At the end of the year, Marietta was seen wearing a balaclava to cover her disfigured face, accompanying Cho on the train, evading Harry.

1996-1997 School Year

Marietta still had blemishes on her face from the jinx the following school year, and took to wearing thick make-up to try to cover them up, with limited success. She sat with Cho on the train to Hogwarts for their final year; they saw Harry Potter during this journey, but did not speak to him and looked away when he walked past them on the train.[3]

The formation of the pimples eventually faded, but left a few scars.[4]

Later life

It is unknown if Marietta returned to Hogwarts and participated in the Battle of Hogwarts alongside Cho, nor if she survived the reign of Lord Voldemort, but given her loyalty issues and that she was considered a traitor by all other members of the D.A., she was at least not accepted back into Dumbledore's Army.

Physical appearance

Marietta is described as having curly, reddish-blonde hair.[2] After she was struck with the Dumbledore's Army parchment jinx for betraying the D.A., she bore pimples spelling "SNEAK" across her face. During the time she bore those boils, Marietta covered them up with a balaclava and then thick makeup, the latter of which did not completely hide them. They faded with time, but Marietta was left with a few scars[4].

Personality and traits

"She's a lovely person really. She just made a mistake..."
Cho Chang describing Marietta.[src]

According to Cho Chang, Marietta was "a lovely person." When Cho became depressed over Cedric's death, Marietta was presumably comforting and supportive.

However, Marietta is one of the many people who were loyal to the Ministry of Magic and was skeptical of Harry Potter's statement of Lord Voldemort returning. She thought that he and Albus Dumbledore were liars and remained cynical towards him even throughout Dumbledore's Army; she only joined because Cho wanted her to.

Marietta's mother was a Ministry employee and as such, Marietta felt strong pressure to be on Dolores Umbridge's good side. Despite having been an apparently faithful friend to Cho Chang, she had no problem with betraying Dumbledore's Army and having her fellow classmates (including Cho) who were in the organization expelled from school. Harry Potter felt that Marietta was a disgraceful traitor, while Hermione commented that she was "stupid".[3]

Magical skills and abilities



Marietta's mother works for the Ministry, and therefore, Marietta herself is loyal to it. She feared that any bad impressions left on Dolores Umbridge, a Ministry representative at Hogwarts, would injure her mother's reputation at office, and therefore refused to get on Umbridge's bad side.

Cho Chang


Cho Chang, Marietta's best friend.

Marietta is one of Cho Chang's gang of giggling friends, and accompanies with her to almost everywhere. However, after the rest of the friends left Cho due to her emotional breakdown from her late boyfriend Cedric Diggory's demise, Marietta is the only one who remained with her. This means that while the others only followed Cho for her popularity, Marietta is indeed loyal and true. However, when Cho brought Marietta to Dumbledore's Army against her will, Marietta eventually betrayed it, and was willing to have even her best friend expelled for being part of an illegal organisation. Cho however still stood up for Marietta, refusing to let Harry Potter badmouth her, and ultimately broke up with him due to this.

Harry Potter


Harry Potter, of whom Marietta distrusts.

When Harry Potter first asked Cho to the Yule Ball, Marietta was one of the many girls that giggled at him. The following year, when the Ministry had the Daily Prophet printing about how Harry is a lunatic for claiming Lord Voldemort returned, Marietta believed it due to her family's connections with the Ministry. As such, when she was forced to join Dumbledore's Army, which Harry was the leader, she became very distrustful and disrespectful to his words and actions. Despite Harry's extremely effective methods of teaching and The Quibbler printing out Harry's version of the story, Marietta continued to believe that Harry was a unstable lunatic, and distrusted him. After Marietta betrayed the organisation he insulted her and broke up with Cho after she defended her.

Dumbledore's Army

Dumbledore's Army, the organisation Marietta betrayed.

Cho forced Marietta to attend the illegal organisation, Dumbledore's Army, against her will, despite it being a great potential of ruining her mother's reputation at the Ministry. None of the members seemed to care too much about Marietta's cynical behaviour against their formation, until she betrayed them to Umbridge, nearly expelling them all. Once that happened, they considered her a traitor and felt that many of the following events were her fault. Also, this betrayal led to an argument between Harry and Cho Chang.


Behind the scenes

  • In the film adaptation of Harry Potter and the Order of the Phoenix, Marietta's acts were cut, and Cho Chang was the one who betrayed the D.A. whilst under the effects of Veritaserum, though she was mentioned in the game when Harry asked Cho to bring her to the DA meeting when trying to ask her for a date.
  • In the books, Marietta has very little dialogue of her own, and none outside of Dumbledore's office, though other characters have discussed and made references about her.
  • J. K. Rowling confirmed that Marietta's pimples faded but left a few scars, commenting "I loathe a traitor!"[4]


Notes and references

Dumbledore's Army
Ravenclawcrest.png Gryffindorcrest.png Hufflepuffcrest.png
Harry Potter | Hermione Granger | Ronald Weasley
Harry Potter | Neville Longbottom | Luna Lovegood | Ginny Weasley
Katie Bell | Lavender Brown | Colin Creevey | Dennis Creevey | Seamus Finnigan | Angelina Johnson | Lee Jordan | Parvati Patil | Alicia Spinnet | Dean Thomas | Fred Weasley | George Weasley | Nigel Wolpert
Terry Boot | Cho Chang | Michael Corner | Marietta Edgecombe | Anthony Goldstein | Padma Patil
Hannah Abbott | Susan Bones | Justin Finch-Fletchley | Ernie Macmillan | Zacharias Smith | Unidentified Hufflepuff girl
Luca Caruso | Alice Tolipan
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