User blog comment:Silver-Haired Seireitou/Sake Time with Sei - Parade of Babelicious Zanpakutō/@comment-3030647-20140531114259

Hmmm, perhaps what Zangetsu could be alluding to at that point in time is the idea that one's zanpakutou's "true power" is dependent on the willpower and motivation of the individual at hand? As we can see, Ichigo's will is to fight...but what if someone's will was to defend? Would you be able to change your zanpakutou's Shikai based on what's in your soul?