Xenovia Quarta is one of the many female protagonists of High School DxD. She is a third-year high school student at Kuoh Academy in Class 3-B and is a natural-born Holy Sword user who wields the Durandal. After learning the truth of God's death in the war, she was excommunicated from the Church and decided to join the Occult Research Club as Rias' second Knight, alongside Yuuto. After Issei's promotion, she now serves under him as his first Knight and is also one of his fiancées.