Ritus from That Time I Got Reincarnated as a Slime / Tensei shitara Slime Datta Ken
When I tested it some different checkpoint and LORA's it seemed to work well with this LORA.
LORA weight 0.8 works great, but feel free to adjust the strength to your liking.
Prompts that I usually used:
Ritus, blonde hair, ponytail, hair ribbon, green eyes, white robe, white outfit, simple robe