Shirou Emiya is a fictional character from the visual novel and anime series Fate/stay night. He is a high school student who becomes a participant in the Holy Grail War, a battle between mages and their summoned heroic spirits. Shirou possesses the ability to create weapons and has a strong sense of justice, often striving to protect others. Shirou is known for his idealistic nature and desire to become a hero. He is the adopted son of Kiritsugu Emiya, a legendary mage, and his character explores themes of sacrifice and the complexities of heroism throughout the series.