Originally Posted by
paulbee
I get it now.
Unohana is fully aware of everything going on. She did stab Kenpachi in the throat, and He died or nearly died.
She brought him back, or he brought himself back, although Ken is totally unaware of this, but Unohana is aware and she is going to repeat the cycle of "Killing" him and bringing him back/allowing him to bring himself back.
During their First fight, the TWO of them made a Tacit Pact. Kenpachi will not die from battle wounds, but he'll return stronger (Saiyan Style). For her part, Unohana did something to Kenpachi, something that PROBABLY to allows him to regenerate and return, from dying.
As someone else mentioned, the blood that splatered on Unohana from his neck stab is still there on Unohana's face, meaning that it actually happened. While, dead/near death with Ken spaced out, Unohana placed his sword back in his hand and continued as though nothing had happened.
I think she means to repeat this cycle until Kenpachi gets strong enough to defeat her.