@meOme:
Just a theory: Maybe he has the ability to increase other people's willpower. As we have seen in OP many times, willpower can create miracles.
PS: I'm 95% sure what I've just written is wrong. xD
I believe that the Okama King-Queen isn´t the person that has found Bentham and Luffy, I am sure that we are going to see him in the last level.
Do you remember that Impel Down is based in the Divina Comedia from Dante?
In the last level of hell Dante tells that it is the hell of the traitors, this is where the ones who made an act of traition against their comraders, countries and benefactors are held and tortured.
Lucifer (the greatest traitor) is shown chewing the bodies of the other 3 major traitors who are Judas, Casious and Bruto. In the case of Impel Down we know at least 2 traitors to the world government, they are Crocodile and Jimbei.
But who is the third one?
One possibility is that they will find that Hancock is the one that has helped Luffy and she will be captured and put at the sixth level with Crocodile and Jimbei making the 3 traitors.
Another possibility is that the third traitor can be one of this people:
- Saul, I doubt this one since he is the one with less possibilities of surviving after the buster call and all this time in Impel Down.
- Tom, he wasn´t a warrior but the 6th level could have been done not around strength but for people that are very dangerous for the World Government. I am sure that he died in Impel Down without telling his secret to the World Government, this is why Spandam and the CP9 needed to investigate Iceburg.
- Okama King-Queen. He (it exist the possibility that she is a female, we don´t know) could have been a king of the World Government that decided to split his country from it and received the Impel Down penalty for doing it.
I highly doubt that third traitor will be one of the characters of the list, Hancock seems to be more fitted for this paper.
In Divina Comedia the great objetive of Dante is going to meet her lover one, in the case of One Piece we have the same situation with Bentham who wants to meet Iwa-San.