Irisviel von Einzbern is a homunculus created by the Einzbern family as the vessel for the Lesser Holy Grail in the Fourth Holy Grail War of Fate/Zero. Wife of Kiritsugu Emiya and mother of Illyasviel von Einzbern, she participates as the Master of Saber (Artoria Pendragon), displaying a kind, elegant, and fairy-like demeanor often likened to a snow fairy. Despite her pure appearance, her upbringing in the twisted Einzbern lineage imparts a subtle cruelty. Loving and devoted to her family, her deepest wish is for Illya to live a normal human life. As the ultimate homunculus successor to Justeaze Lizrich von Einzbern, she possesses powerful magecraft but has a limited lifespan.