>>2229
It's usually not enough to just punch in "[character], fat", you usually have to describe the character you want in detail.
For example, image #1 of this post is just "gawr gura", and is completely unrecognizable as gura, but image #2 is "gawr gura, hololive, virtual youtuber, blunt bangs, grey hair, blue hair, blue hoodie, blue eyes, bare legs, shark girl, shark tail, shark hair ornament, shark hood, two side up, shark costume" with negative tags "blonde hair, purple eyes, grey hoodie, cat ears, animal ears, shorts, short shorts, skirt, miniskirt, thigh_strap, pants, leggings".
Just go to gelbooru or danbooru, pull up an image for whatever character you want to replicate, then copy its tags. If your character isn't on a booru, or doesn't have many results, you'll have to either make an embed or get creative with prompting&inpainting.
Then, once you are satisfied, you can start adding the tags you actually want. Images #3 and #4 have the gura prompt + some fat tags.
And when you have a good image, if you want, can do some inpainting to fix details like hands, faces, clothes, anatomy, etc. A good candidate here would've been gura's shark tail or hands