Kiritsugu Emiya is a fictional character from the visual novel and anime series Fate/Zero. He is known as the "Magus Killer" due to his ruthless methods in combat and his goal to achieve the Holy Grail, a powerful artifact that grants wishes. Kiritsugu is a skilled mage and strategist, often using unconventional tactics to outsmart his opponents. Born in the Emiya family, Kiritsugu was raised with a strong sense of justice, which often conflicts with his pragmatic approach to achieving his goals. His complex personality and tragic backstory make him a compelling figure in the Fate franchise, influencing many characters and events throughout the series.