Death Eater

The Death Eater hurling a spell at a Hogwarts defender, moments before his fight with Arthur

This Death Eater fought during the Battle of Hogwarts, and helped engage in a mission near the Quad battlements. He took down a Hogwarts defender via Killing Curse before engaging Arthur Weasley in combat. Their spells locked together in Priori Incantatem. It is unknown what happened to the Death Eater, though it is likely that he was killed by Arthur during the duel.