She's a 12 year old kid with severe mental health problems.
Any sexual content with her would be weird as fuck and, given the layout of the story, really rapey.
But you are aware about the following two things?:
1) There are people that are into "rapey"
2) "Rapey" isn't a problem on this site
Of course, it is problematic that she is 12, but the dev could just change that.
It's not an opinion, but a fact, that the dev uses the loli theme to pull players to his game - you don't need to make a young girl the center of the cover of your adult game and you also don't need to provide example renders that make your players assume fitting content. Even while playing, building "loyality" and "control" stats with the girl make you feel like this would lead to something erotic.
It's an adult game, don't hightlight what you don't intent to give. The current approach feels quite dishonest.
I understand that you don't like specific themes, however, other people do.