Shirou is a high school student living in Fuyuki City. Ten years ago, he was the sole survivor of a massive fire, rescued by his adoptive father, Emiya Kiritsugu, a retired magus. Since Kiritsugu’s death, Shirou lives alone but is frequently looked after by Fujimura Taiga, his boisterous homeroom teacher.

Shirou returns home, confused but alive. Moments later, Lancer tracks him down for a second kill. Shirou flees through his shed, where he accidentally stumbles upon a magical circle — left by Kiritsugu. As Lancer lunges, the circle activates, summoning a Servant: a beautiful young woman in silver armor and blue dress, wielding an invisible sword.

She deflects Lancer’s attack. When he asks her name, she replies: