Corban Yaxley

Yaxley is one of Lord Voldemort's Death-Eaters in Harry Potter and the Deathly Hallows: part 1 and ''Harry Potter and the Deathly Hallows: part 2. ''He is portrayed by actor Peter Mullan.

Role in Deathly Hallows: part 1
Yaxley served as one of Voldemort's spies inside the ministry. He placed Pius Thicknesse under the Imperious Curse on Voldemort's orders, so that Thicknesse could kill the previous minister and become minister for magic himself.

He appeared during the Death-Eater meeting in the beginning of the movie where he was telling Voldemort the date when Harry Potter was going to leave the house of his aunt and uncle. But he was interuppted by Snape who told him that that was a false statement and the aurors tricked him by giving him a false date.

Later, he appears on the side of Dolores Umbridge at the Ministry of Magic where he is helping interrogating Muggle borns. He is knocked out by Reginald Cattermole (who is actually Ronald Weasley in disguise) and discovers that one of the employees of the Ministry was actually Harry Potter in disguise. After the trio accidently unleashed some Dementors, he followed them and tried to chase the trio. He was able to grab them when they left by the Floo Network, but he was dropped off when Hermione changed location after she discovered that they were followed.

Trivia

 * On the DVD version of Harry Potter and the Deathly Hallows: part 1, Yaxley is seen in one of the deleted scenes where he enters the house of Hermione's parents. But nobody was home since Hermione casted a spell on her parents earlier to make them leave.