Update: SDXL 0.9 experimental lora version.
You will need to follow this steps to use it https://github.com/AUTOMATIC1111/stable-diffusion-webui/pull/11757 and set --no-half-vae or just use ComfyUI
Tiled VAE from https://github.com/pkuliyi2015/multidiffusion-upscaler-for-automatic1111 extension is also recommended to use, because of a new model VRAM demands
Use "chibi" inside the prompt to get more miniatured character if you want.
Twitter link to original style artist: https://twitter.com/fried_rice0614