Thread:Mangetsu20/@comment-5778280-20130523224201/@comment-4326112-20130526025517

Well, a Zanpakutou should always mirror the truth behind the Soul Reaper's heart, and evolve over time spent bonding with it, or at odds with it, when training and using it. Their powers come from the character, personality traits, and desires of the Soul Reaper, and are forged within the nature of the Zanpakutou itself.

Does that help at all?