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, Nahida, solo, breasts, flat breasts, long hair, white hair, green hair, gradient hair, side ponytail, bangs, hair between eyes, braid, pointy ears, green eyes, symbol-shaped pupils, cross-shaped pupils, hair ornament, leaf hair ornament,

Negative prompt : EasyNegative, badhandsv5-neg, three hands, more than two arms, three feet, more than two legs, verybadimage, Negative v1.3, ng_deepnegative_v1_75t, ugly face:0.8, cross-eyed, sketch, worst quality:1.2, low quality:1.2, normal quality:1.2, lowres, unfinished, poorly detailed, censor, bad face, bad hands, bad feet, extra limbs, extra digits, missing digits, deformity, disfigured, malformed, amputee, several limbs, missing limbs, extra head, large head, long chin, distorted anatomy, bad proportions, blurry, monochrome, abstract, watermark, logo, signature, text, artist name, username, simple background, scan artifacts, jpeg artifacts, lossy-lossless, reference sheet, ai generated, official art, duplicate, skin spots, acne, skin blemishes, deepnegative, ((extra fingers:1.2)), back facing, tilt head, cropping, mutation, fused fingers, long neck, mutant hands, polar low resolution, bad body, overall proportions,