Yoruichi saved the whole Bleach plot right here. If she didn't show up here, how would the whole plot change?

But why? As a fan of this series for over 21 years. I been reading bleach like the holy scripture and the only things I can come up with is my own head canon. Yes offense, Yoruichi lacks a lot of characters writing.

Kisuke knew she would show up, infact he planned for the worst when he heard about it first thing about the souls disapearing (he theorised that it was a hollow experiment from the get go)