Subsequently, one may also ask, who betrayed the Order of the Phoenix in Deathly Hallows Part 1?
The Deathly Hallows Part I begins with a whole bunch of double-crossing and betrayals. Snape betrays the Order of the Phoenix. A guy from the Ministry of Magic becomes a Death Eater, which is probably how the Ministry ends up falling. And that's just the beginning of the movie.
Beside above, who was the traitor in the 7 Potters? The rest of the Order was unaware of this, as they believed Snape to be a traitor. However, they accepted the plan to have seven Harry Potters, each escorted by an Order member acting as a protector, and fly away from Little Whinging, as no other method of transportation was safe.
One may also ask, who was the spy in Deathly Hallows?
Augustus Rookwood was a Dark wizard and a Death Eater loyal to Lord Voldemort. During the First Wizarding War, he was a spy who worked as an Unspeakable in the Department of Mysteries.
Was mundungus a traitor?
It is unknown if Mundungus fought along with other members during the Battle of Hogwarts. It was also mentioned that Mundungus was loyal to Albus Dumbledore, who had helped him at some point in the past. Albus scared Mundungus a bit but nevertheless, Mundungus never betrayed him.
