Is it possible that Darth Bane is in complete control of Zannah's body?

If you have read "Dynasty of Evil" in the Darth Bane saga this question is for you: Everywhere I go on the internet, everyone says that Darth Bane is dead, and that Zannah beat him in a battle of wills when he tried to use essence transfer to take over her body. I don't think that is necessarily what happened, for three reasons. Number 1: when Zannah got up it said (through Darth Cognus' eyes I believe) that it looked as though she did not know how her own muscles worked, this really seems like foreshadowing the fact that Bane won the battle of wills. Number 2: I see a lot of people say that Zannah's hand "Twitched" and that it might be a ghost of Darth Bane, or a piece of him left inside her, however her hand didn't twitch, she was flexing her hand (I forget the actual word the author used) but it wasn't involuntary, she was testing her left hand, and that really makes me think that it's Darth Bane in there. Number 3: Through out the entire book it said how strong Darth Bane's will was, and what amazing discipline he had, only at the end to supposedly have him beaten in a battle of wills? I don't buy it. He already beat her will once in the fight when she tried to unleash sith sorcery on him. So my theory is that Darth bane took over Zannah's body, but being the genius he is and having some kind of amazing foresight as to how being thought of as dead would help him in the end, also took her identity. If anyone has some thoughts on this I would love to hear them, and sorry I may have misworded a few things, I just lent the book to a friend of mine, so I couldn't double check everything.