Zanpakutō Growth: Shikai and Bankai
Name · Relationship · ReleaseIn the 2004–2012 anime, a Zanpakutō is not just issued equipment. Its power develops through the Shinigami's relationship with the spirit and name inside the blade. Shikai begins when that name can be called and its released ability used. Bankai requires a much deeper level of manifestation and mastery, and the Soul Society arc treats achieving it as the threshold separating exceptional officers from the captains who normally define the ceiling.