The best settings :

Euler a

Checkpoint : WAI-NSFW-illustrious-SDXL - V13

steps : 25

CFG : 5

Clip skip : 2

Strength : 1

Prompt : masterpiece, best quality, amazing quality, fine details, Rem, solo, breasts, medium breasts, short hair, blue hair, bangs, hair over one eye, blue eyes,

Outfit : hair ornament, x hair ornament, maid, roswaal mansion maid uniform, head wreath, maid headdress, neck ribbon, black neck ribbon, frills, long sleeves, detached sleeves, skirt, black skirt, apron, thighhighs, white thighhighs, shoes, black footwear, ribbon, hair ribbon, ribbon trim, black ribbon,

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, ((steam)), ((extra fingers:1.2)), back facing, tilt head, cropping, mutation, fused fingers, long neck, mutant hands, polar low resolution, bad body, overall proportions,