Trained mostly on screencaps from Frieren.
It basically turns the character monochrome black/brown.
It can be difficult to use. The only way I could get it to work consistently is adding the monochrome tag but that usually causes the background to be darker. Doesn't help that every screencap was from a dark dungeon in the show. To get a bright background, I had to play around with tags like sun and day, or adding greyscale to negative prompts. Sometimes using greyscale made the character not dark anymore so I wouldn't do it all the time. Also has varying results when used with other loras, you will have to play around with weights.
spiegelreplica6135, monochrome, expressionlessIf you want the original colored character in the same image, you should use regional prompter.