Irisviel von Einzbern is a key character in the Fate/Stay Night series, known for her role as the homunculus wife of Kiritsugu Emiya and the mother of Illyasviel von Einzbern. Created by the Einzbern family, she is designed to be both a vessel for the Holy Grail and a participant in the Fourth Holy Grail War. Despite her artificial origins, Irisviel possesses a warm and caring personality, often displaying deep empathy and understanding. Her involvement in the war and her relationship with Kiritsugu add emotional depth to the series, making her a beloved character.