Sōken Ishida

, was the father of Ryūken Ishida and the grandfather of Uryū Ishida.

Character Outline
He trained Uryū and Ryūken in Quincy abilities throughout his childhood, becoming his mentor in the process. He was a kind old man whom Uryū admired. He preached an unusual variant of Quincy philosophy advocating cooperation with the Shinigami. Sōken tried to make amends with the Shinigami by advocating a new system of response to Hollow attacks: Quincy would be the first-response squad, protecting Humans from Hollows until the Shinigami arrived to dispatch the Hollow, thus maintaining the spiritual balance between the worlds that was being destroyed by the Quincy. However, his proposal was never accepted, despite several attempts.

He was killed in battle when a group of giant Hollows attacked him, as the Shinigami arrived too late to save his life. During the rescue of Rukia Kuchiki, Mayuri Kurotsuchi reveals to Uryū that this was his doing; he delayed the Shinigami meant to protect Sōken so that he could study Sōken's soul for his research. According to a reflection of a photograph seen in Uryū's glasses, all that was left of him in the end was his head. His death is the primary reason Uryū initially hated the Shinigami.

Agent of the Shinigami arc
Though not actually present, Sōken was seen during Uryū's flashbacks, and his role with training him as a Quincy was revealed. His death also the driving force behind Uryū's intense hatred for Shinigami, and the subsequent duel between him and Ichigo Kurosaki, causing his grandson to inadvertently summon a Menos Grande into Karakura Town. Sōken is also the one who gave Uryū the Sanrei Glove, which would be important for him during the upcoming battles.

Soul Society arc
During the Soul Society Arc, Sōken is shown in a picture taken by Mayuri Kurotsuchi, shortly before his death. Upon seeing the photo Sōken's grandson, Uryū Ishida, fought the captain with all of his strength. Despite the overwhelming anger he felt towards him for Sōken's murder, Uryū spared the captain's life (but claimed his arrow had missed.)

Bount arc (anime only)
Note: Events occurring in this arc are only in the anime and do not constitute canon material.

Sōken appears to Uryū when he reaches his limit after the fight with Yoshi, apparently some kind of apparition akin to a traditional spirit more than a Plus, or a vision. He gives Uryū a few words of wisdom, and assures him not to push himself too far, telling him that there is nothing more that can be asked of him since he fought with everything he had, which is all that can be asked of any man. The vision of Sōken leaves his grandson to think about his words.

Powers and Abilities
Quincy Bow & Spirit Arrows: Sōken was shown creating a bow, as well as teaching Uryū exactly how to use his own bow. He had a bow similar to Lone Sparrow, and fired arrows of varying degrees. It was not named.

Mayuri Kurotsuchi studied Sōken extensively, but found no abilities other than common Quincy abilities. So far, he has not been shown doing anything too advanced either, but it can be assumed he was very powerful during his prime.

Quotes

 * "A heart of vengeance forges the soul firm with resolve, but if one's not careful vengeance can be blinded by obstinacy and pride, thereby dulling the blade."
 * "The Quincy's arrows are released in the name of Justice. In other words justice is when you have something that must be protected. There is nothing more difficult than the basics that I have just taught you. From there on, it depends on your heart. In the name of justice, Quincy's release the arrows from their hearts."
 * "Be it Human or Shinigami, seeing a sad face is unbearable to me. "