Fantastic picture. The colors are gorgeous, and so well matched. And the purple background (with the blue windows!) sets everything off nicely. The other two girl and robot picks are also excellent, but this is my favorite.
I am not sure what aibooru picks for metadata, but the model used is wrong. it's an unholy cross of naturalnoob and kurimomi. probably fetched the model fromthe sd prompt saver which I never bother to assign it into.
UPD: yeah, it definitely is picking stuff from sd prompt saver. it can be entirely disregarded as I never fill anything but the seed and folder to save to
From looking at your other images, I assume you used img2img, and some image editor as well? This is pretty nice.
Ah yeah, I just use Krita for merging images. The key things I recommend are: comfyui-impact-pack's maskdetailer, comfyui-prompt-control, and merging your own models w/ ModelMergeSimple (part of Comfy-Core) to get the art style that you really want.