Shiro Emiya is a crossover character from Fate series. He is the protagonist of the Fate series and act as a secondary protagonist in Yu-Gi-Oh Stay Knight. In this Universe, his background has been modified.
Archer's real name was Shiro Emiya. He was a freelance magus hired from Meiji Era. He was one of seven participant of the Meiji Restoration Holy Grail War. At that time, Duel Monster had not been created so the participant of the Holy Grail War had to kill each other for it. He won the war with his servant but instead of had his wish granted, he destroyed the grail since he taught that it caused many conflicts and deaths.
Archer went to London with his friend, Rin Tohsaka, another survivor from the same war he was in. Archer became a freelance magus and sent to many battlefield....(Unfinished)