User blog comment:CoolJazzman/Soken Ishida death caused by Yhwach?/@comment-3465448-20130625113844

Soken was an Echt Quincy and thus would have been spared from Yhwach's Auswahlen. Masaki was also an Echt Quincy but at the time she was "impure" due to her inner Hollow. However given the recent amount of plot twists I wouldn't completely write off the idea.