Ishida, Ryuuken

石田竜弦

Uryuu Ishida's father. He is familiar with the ways of the Quincy and was once among the most powerful, yet he considers it a waste of time. He has stated that while his son possesses the heart of a Quincy, he himself holds the power, as he trains his son to regain his Quincy abilities. He promises to train him, but only on the condition that he gives up his friendship with Ichigo. Although he refuses to participate in Quincy activities, he displays a distaste for Shinigami.
He also reveals that he knew Ichigo's father in the past. Short clips at the end of episodes show them together, usually ending with Ryuken using his Quincy powers to fire arrows at Isshin after Isshin teases him or tries to show pictures of their past. They are both doctors, with Ryuken running a hospital and Isshin running a clinic.