The amateur magus and central protagonist who becomes a Master in the Holy Grail War. Initially driven by a rigid ideal of becoming a 'knight of justice,' he evolves through trauma and sacrifice, ultimately prioritizing the preservation of his loved ones and choosing a path of atonement and life over his original dogma.
Kirei performs medical procedures on Sakura and provides critical diagnostic information to Shirou.
Shirou and Rin form a practical alliance, sharing resources and strategies to survive.
Shirou and Sakura develop a deep romantic bond, culminating in a physical relationship.