Walden Macnair

Macnair appears in LEGO Harry Potter: Years 1-4

Background
Walden Macnair was a Death Eater. After the supposed 'death' of Lord Voldemort, Macnair turned to the ministry, and took up a job of executing beasts. He was Buckbeak's would-be executioner, but Harry and Hermione saved the Hippogriff just before the execution. After, he was sent to Azkaban for following Lord Voldemort and practicing the Dark Arts.