It has never been said that the Soul is not important but it is never said that it is. But it is said that there is a Soul so if there was no importance to it why mention it?
My guess it that is does have importance that has not been revealed. It is possible that the Soul and Heart can retain memoires. That would explain why Nobodies have memories. Without a heart they wouldn't remember one second ago cause there would be nothing to hold those memories.
My guess it that is does have importance that has not been revealed. It is possible that the Soul and Heart can retain memoires. That would explain why Nobodies have memories. Without a heart they wouldn't remember one second ago cause there would be nothing to hold those memories.