Board Thread:Questions and Answers/@comment-38252403-20190121180547/@comment-39816307-20190615092713

I would imagine Ichigo and his Zanpakuto are an excellent expamle of this, notice how as Ichigo becomes more capable and focused, so too does Zangetsu; however You might notice that when Ichigo becomes frusterated and irate, losing a sense of focus, Zangetsu seems to retreat to a more sullen and rational outlook, straying from his sense of energy and honing his mind; wheras when Ichigo becomes more rational yet sullen and such, Zangetsu seems more relaxed focused on how to help Ichigo. I think that the relation which you are referencing is a personal one; baring in mind that both Shinigami and Zanpakuto are indipendant souls which are attached to one another (That being that the soul of a Zapakuto dies when it's counterpart does) that the bond of personality is an emotional one, nessentially being a life-or-death based emotional connection. A sense of empathy is all that is required to understand the relation having observed this concepts. I hope this helps!