Matthew Caradoc Avery was a wizard and half-brother of Gaston Avery and a Slytherin student at Hogwarts School of Witchcraft and Wizardry. After graduating from Hogwarts, he became a Death Eater. He fought in several battles during the First Wizarding War. Avery did not seek out Lord Voldemort after his downfall, but this was forgiven upon his master's return. During the Second Wizarding War, Avery fought in the Battle of the Department of Mysteries with a group of Death Eaters, trying to get a prophecy out of Harry Potter. After the battle, he was imprisoned in Azkaban, but escaped in 1997. That same year, he became engaged to Dorcas Meadowes. He fought during the Battle of Hogwarts and years later was imprisoned again in Azkaban. When he managed to escape once again, he discovered that he was the father of a twelve-year-old girl named Hope Avery.
At Hogwarts, he was goalkeeper and captain of the team for a few years. He was known for his sadistic pranks alongside Slytherins such as Mulciber and Lucius Malfoy. He had a troubled relationship with Dorcas Meadowes, a member of the Order of the Phoenix and mortal enemy of Avery and his ideals.
