This is a pretty simple workflow. Wan 2.2 T2V low noise model makes an awesome post detailer, since it's designed to detail the composition of the high noise model. Just drop your image into the load image node, script the composition of your image in the 'Prompt' text box (or get an LLM to do it for you) and watch Wan level up your image.
I've added a few options to help with detailing and scene/character consistency:
Wan NAG - direct Wan to the elements of the image you'd like it to focus on.
Reactor FaceSwap - for increased character consistency from original image.
I've also added directions in workflow for refining your output to increase either consistency or divergence from original image.
Enjoy. 😊👌