Ling Yao

Ling Yao, is the twelfth crown prince of the eastern nation of Xing and the liege of the Yao clan. Seeking a way to ensure his path to the throne amidst deadly inter-house competition, Ling has ventured from Xing to Amestris in order to divine the secret of immortality - the Philosopher's Stone. He is also a human-based Homunculus after being the vessel of the Homonculus named Greed.