Shirou Emiya is the parallel version of the Shirou from Illya's world. He is the Card User of the second Archer Class Card of the Fifth Ainsworth Holy Grail War.  He lost both of his biological parents to an accident and whilst trapped beneath the scrap and debris, he was saved by Kiritsugu Emiya who later became his adoptive father and mentor. He followed Kiritsugu to Fuyuki City, to investigate the Sakatsuki family. When they arrived, the city was engulfed by a black shadow. Shirou notice a pillar of light in the Sakatsuki estate, Shirou saves the Child of God from a collapsing roof. Through some unknown means, she was born as the perfect vessel of the Holy Grail. Learning proper magecraft from Kiritsugu unlike his counterparts, Shirou fought to remove Miyu from the grasp of the Julian Ainsworth and allow her to escape to the other world. He eventually became captured and used as a means of keeping Miyu in check once she returned.