Ayaka Sajyou is a fictional character from Fate/Prototype, the prototype version of Fate/stay night. She is a spirited, ordinary high school girl who becomes involved in the Holy Grail War and serves as the Master of Saber. Ayaka is notable for her strong will, emotional honesty, and determined personality, often acting as the story’s central human viewpoint. Her relationship with Saber and her reactions to the supernatural conflict help define the tone and direction of the narrative.