Here's a lora that aims to reproduce the style of Hiroshi Saitō and the likeness of the characters from this excellent TV show (adapted from the work of Mark Twain).

The lora has been trained mostly on official celluloids in order to improve the fineness of the line.

There's no trigger word, but "digital illustration in a traditional anime style" is a good way to start.

If you want to reproduce the grainy aspect characteristic of the old episodes, you can set denoise to 0.85.

Don't hesitate to open the .png files in ComfyUI (or https://comfyuiweb.com/) to see how they were made.