Ling Yao is a major character in the Fullmetal Alchemist manga and 2009 anime adaptation. He is a Xingese prince who came to Amestris in search of the philosopher's stone so that he may use it to save his ill father. His search eventually leads him to merge with the homunculus Greed and the two even join Ed and Al in their quest to defeat Father and save Amestris.