Xing Emperor

The emperor of Xing is the father of both Ling Yao and May Chang as well as eighteen other royal scions. As Emperor, he is sent a concubine from each of the 50 families that make up the nation in order to bear a child. He is rumored to be of failing health, prompting both Ling and May to venture to Amestris in order to find the secret to immortality so as to raise the standing of their respective clans.

In the near future, he seems to have retired and left Ling as the new Emperor, who had acquired a Philosopher's Stone.