So just to refresh my memory... and I hope I get the plot wrong, so please someone correct me on this
The Slum King and Ryo are both the same person, the reincarnation of Satan from Devilman
This Violence Jack verse, is a reality of a pseudo purgatory/hell in which Ryo, Akira, and Miki are stuck being tortured or fighting each other because Satan didn't got his feelings reciprocated by Devilman
And the Slum King is torturing himself in the form of Ryo out of self pity, while also raping and torturing Miki, because he still blames her for Akira/Devilman not becoming his lover
While Akira reincarnated as the different Violence Jacks, Urchins, and muscle women, and is veeery slowly maybe trying to stop Ryo/Slum king/Satan from keeping this bullshit?
And everyone else is also a facet of these 3, except for the Slum King's secretary who may be either Satan again or the reincarnation of Psycho Jenny?
Alternative maybe this Miki, Ryo' sister, and the Slum King secretary, are also just Satan too, and it really is just Satan and Devilman stuck with each other their reincarnations, and Miki was never there at all