Yes, in the book. In the movie, she was cut and Cho did it under the effects of Veritaserum. In the book, however, Marietta betrayed the D.A. of her own free will.
In the Room of Requirement.
In the movie, yes (but only under the effect of Veritaserum). In the book it was her friend Marietta Edgecombe.
Hogs Head in Hogsmead
The ministry of magic has an unfounded fear that Dumbledore wants to take over the ministry.
Marietta Edgecombe
Many people. That fanfic of Thanfiction is really dark, and its sequel (Slaught) is even more dark.
Sell This House - 2003 Marietta GA Paul Rippy 5-16 was released on: USA: 5 January 2008
these wands can be found at many bookstores where they sell the harry potter books.
knock
Yes, Marietta Edgecombe tells Umbridge (or Cho Chang in the movie).
Susan Bones goes to Hogwarts school and is a member of hufflepuff and is also a member of dumbledores army. Sadly her mother [Amelia bones] got murdered by Voldemort.
Well, the books are quite misleading and you don't find out until the near-end but yes ("Sanpe") Snape is on Dumbledore's side