Softestcore is one of my all time favorite artists, and I've been getting some great results with their work.
The prompts I use have been something like:
"Please turn this image into an indoor photograph, changing the cartoon character into a realistic human (a young woman). Preserve the exact same anatomy, pose, and composition exactly. "
I then add in a bit about what background or additional people I want to see. And I can say "ignore text" or not.
I usually run the request with Fast, to see if it'll deny it or not. And then, if it generates something, I'll choose the "Redo with Nano Banana Pro" to generate these.