To jump into this (short) discussion; I also have been experimenting a bit with some AI gens using the Rance artstyle.
I came across
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LORA which easily produces characters from the Rance universe and in the art style:
I don't have the prompt anymore, but I got Sill from just something with "pink hair" and "slave girl".
It seems to do a pretty good job overall, but I found that it has a problem with anatomy (hands especially), so it might require some additional LORAs to get good stuff. Or manual editing.
I was/am looking into getting some better images of Sill and other characters as replacers, mainly because I hate censored images and many in-game images are relatively low resolution.
I'll post some more info on my experience with AutismMix + this LORA, settings and prompts later.