weight could be 0.6 - 0.8( makes it flexible for styles ) - trained for 768 or higher - 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 - compered to other loras of Undyne
some styles may force skin to be - pale skin,yellow skin, put these in NEG it may help
face/body
undyne, blue skin, yellow eyes, red hair, - ponytail,
sharp teeth, gills, slit pupils, head fins - any fish enhancing prompts
eyepatch, results may vary - was trained with two eyes also
makeup, or eyeshadow, - suggest forehead mark, facial mark, in NEG
may be muscular, or toned,
Outfit
black shirt, collarbone, toned, bare shoulders, pants, or jeans, red boots,