You need this extension in order to use this. Please follow the instructions on the github page to use.
https://github.com/kohya-ss/sd-webui-additional-networks
This is a LoRA for Shinobu Kochou (Demon Slayer).
When prompting for her original outfit:
kochou shinobu, multicolored hair, no bangs, hair intakes, purple eyes, forehead, black shirt, black pants, haori, butterfly, buttons, belt,