Shinji Matou (間桐 慎二, Matō Shinji?) is the acting Master of Rider in the Fifth Holy Grail War of Fate/stay night. He is merely using the Servant of his adopted younger sister, Sakura Matou due to his inability to use magecraft. He has been a friend of Shirou Emiya for a number of years. He has an open crush on Rin Tohsaka, but she does not return his interest, much to his frustration.