/upscale
((masterpiece)), (((best quality))), 1girl, anime, portrait, illustration, beautiful girl, shy, ruby rose, <lora:RWBYRubyRoseCharacter_lora30:0.4>, smooth skin, painting by stanley artgerm lau, Tom Bagshaw, sideways glance, beautiful, sexy, colourful, smooth skin, artstation, foreshortening, ((high resolution)), (ultra quality), (highly detail eyes), highly detail mouth, highly detailed face, (perfect eyes), (both eyes are the same), glare, Iridescent, Global illumination, perfect hands, real hair movement, real light, real shadow, real face, hd, 2k, 4k, 8k, 16k
DarkSolus
Least prone to straying from the prompt (white dress stays white), however, may be slightly inaccurate when depicting Ruby. Best weights seem to be in the area of 0.6 to 0.7, and for best results I recommend adding in tags like "grey eyes, red hair, multicolored hair". Higher weights can sometimes lead to facial artifacts and/or weird anatomy.