https://civitai.com/models/331998/power-chainsaw-man-anime-ponydiffusion-xl

This model is Trained on +300 screencaps hand picked from Chainsaw Man S1 no fan-art or anything like that. Trained on PonyDiffusion XL so won't work with other model. Best result used in conjunction with Smooth Anime Style LoRA XL

Base prompt: 1girl, p0w3r0x1, long hair, blonde hair, red horns,demon pupils,looking at viewer

From the base prompt you can add some tested extra tags to archieve classic outfits

"red sweatshirt,denim shorts"

"white collared shirt"

"black necktie"

"blue jacket,white collared shirt,black necktie,black pants" "black jacket,white collared shirt,black necktie,black pants"

The demon form prompt is (not perfect):

p0w3r0x1, messy hair,blonde hair,demon pupils,nude,dirty,demon horns