The New Captain Shusuke Amagai arc serves as a brief filler arc, providing a respite from the main story. This arc introduces a new captain, Shusuke Amagai, and explores the aftermath of the events in the Fake Karakura Town arc.
Throughout the various seasons of Bleach, several notable themes and character arcs emerge: bleach seasons
Before diving into seasons, understand the naming convention: The New Captain Shusuke Amagai arc serves as