The Sternritter were created by Yhwach to invade Soul Society. Each member is granted a Schrift, a unique power by Yhwach. When they pass away their power returns to Yhwach, making him stronger.

Seydlitz, a loyal member, met his demise during the war with Gotei 13 by Yamamoto's Bankai.

The episode showed the elite Sternritter Gerard standing in front of Renji, Byakuya, Shinji, and many other Shinigami, blocking their path to Yhwach’s castle. As Gerard used his ability ...