Kiritsugu Emiya (衛宮 切嗣, Emiya Kiritsugu?) is the Master of Saber in the Fourth Holy Grail War of Fate/Zero. He is the husband of Irisviel von Einzbern, the father of Illyasviel von Einzbern, and the adoptive father of Shirou Emiya. He is the main protagonist of Fate/Zero and has a minor role in Fate/stay night. He was a freelancer and notoriously known as the Magus Killer (魔術師殺し, Majutsushi-goroshi?).