虛淵玄
Saber was created by Kinoko Nasu after the series' main illustrator suggested having an armored woman as a protagonist for the visual novel; writer Gen Urobuchi commented on her character becoming darker depending on the scenarios. Urobuchi created his own scenario involving interactions between Saber and Kiritsugu because their relationship was little explored in the original visual novel. Saber has been voiced by Ayako Kawasumi in her Japanese appearances and multiple actresses took the role in English-language dubs of the series' animated adaptations.