7 Harry Potter Villains Who Weren’t In Slytherin

Marietta was another member of the DA who should never have joined. Though she wasn’t as nasty as Zacharias, her actions had severe consequences.

Due to the fact her mother worked for the Ministry, Marietta always felt guilty about being a member of the DA. But this still doesn’t excuse her betrayal. Rather than leaving the group independently, Marietta snitched on her fellow students and told Umbridge about the DA. She even betrayed one of her closest friends – Cho Chang.

Marietta may have been a decent person, but based on her actions in The Order of the Phoenix, she was a very selfish individual who did not care about her fellow pupils. Indeed, given Umbridge’s love of pain, she was lucky Dumbledore took the blame and saved his students from any serious punishments.