Her initial concept was based on Fujino Asagami.[15] Upon looking at Sakura Tohsaka depicted in Character material, Gen Urobuchi thought "aah, right now I'm writing about a world that does its best to brutally mistreat this kind of girl." It was a "huge mental burden" for him, so he decided to torment her even more. While she only appears twice, her "misery index" may actually be the highest in Fate/Zero. In the original draft of the scene of Kariya's death, the plot was "inhumane." Nasu "scolded" him for it, asking him "What color is your blood, anyway!?" It became one of the few scenes he stopped, making Sakura's monologue into a very mild and calm one.[16]