In Bleach TYBW, Ichigo Kurosaki’s friend and close ally Uryu Ishida seemingly embraced a dark path as he joined the Wandenreich to become a Sternritter in the service of Yhwach, the Quincy Emperor.

The episode revealed that Uryu Ishida's actual goal as a Quincy was to stop Yhwach. That's why he intended to shoulder the responsibility and seemingly "betray" his friends to gain the Quincy King ...