Quote Originally Posted by Saiges View Post
This! Shunsui must have referred to the title. We don't even know what Unohana's bankai does (flesh absorption/darkness illusions?).
Zaraki will spare her life as a return of favor and send her for a full-time job in the kitchen.
Just a guess.

I think Unohana used her Bankai on Both of them. Seems that it reconfigures and rebuilds the body.