Marietta attended Hogwarts.
- Education Notes
- As Cho had a romantic interest in Harry Potter, who was at the centre of the Ministry's smear campaign, this left Marietta in a difficult position. Marietta joined Dumbledore's Army entirely because of peer pressure. Dumbledore's Army was doing the one thing the Ministry didn't want to happen; training students in combat.
Eventually, Marietta betrayed the D.A. to Umbridge; however, the parchment that all members had signed had been jinxed by Hermione, so she broke out with pustules which spelled the word, "SNEAK". Umbridge took Marietta to testify against Harry, but Kingsley Shacklebolt swiftly modified her memory, to keep Harry and his friends out of trouble.