to keep close to her old design try any of these - or put in Neg ( when altering appearance/outfit)
may need to add 3d, or realistic, in neg for certain 2d/anime styles - lower weight for less 3d influence - 0.8 between 0.6
PonyXL version may need a XL VAE as a 1.5 VAE may cause issues - Images may be - at or past 1024x1024 or 832x1024 - Sampling steps past 30 - this can work with any model that is PonyXL or was merged/trained from it - realistic, or anime, in prompt may help - DOES NOT WORK WITH 1.5 checkpoints - TW is hopexl,
face/body
Hope, green eyes, black streaked hair, long twintails, or twin braids, - long hair, or ,very long hair,
her build is small breasts, and hips, - the usual thick cartoon milf thing
if no twintails, she would have very long hair, and big hair, floating hair,
can try messy hair, in neg - if its too much
Outfit
earrings, necklace, green dress, sandals
have no bra, or underwear, no panties, (bottomless,) training