Ranryou Ou, also known as Prince of Lanling, is a heroic spirit in the mobile game Fate/Grand Order. He is a gentle and mysterious figure who was a renowned Chinese general during the Northern Qi dynasty, famed for his beauty and valor in battle. In the game, Ranryou Ou is a Saber-class servant who supports his allies with powerful buffs and defensive abilities. He is beloved by fans for his loyalty, masked visage, and tragic yet noble backstory.