to keep close to her old design try any of these - or put in Neg to reduce chance - SFW/NSFW
may need to add 3d, or realistic, in neg for certain 2d/anime styles due to having more 3d image training - or lower weight for less influence
Pony XL - V6 TW is betafwxl,
face/body
beta, green eyes, brown hair, or orange hair, short hair,
suggest glowing eyes, messy hair, in NEG
Outfit
white shirt, short sleeves, white pants, sandals
shirt deign may alternate by being semi-see through