The best settings :

Euler a

Checkpoint : WAI-NSFW-illustrious-SDXL - V14

steps : 25

CFG : 5

Clip skip : 2

prompt : masterpiece, best quality, amazing quality, fine details, Frieren, elf, solo, breasts, flat breasts, long hair, white hair, twintails, bangs, parted bangs, pointy ears, green eyes,

outfit : earrings, red earrings, pantyhose, black pantyhose, boots, brown footwear, shirt, earrings, dress, white dress, belt,