LoCC: Him, Shiro and Ling lived in a monastery in China training to become priests. One day, he said that he would never respect Shiro and Shiro would never be better than him, making him leave.
LoCC II: Accompanied Shiro in recruiting Toby to the Foundation after resolving issues with Toby's dog, Baxter.
LoCC: Very serious. During his childhood, he made Shiro feel bad about his average abilities from training as a priest, making him leave one day.
He uses the Seal Drago sub-clan from Kagero.