to keep close to thier 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 -
Three separate loras - mainly 3d training - Rina/Shizue should be fine but I suggest growing Rika size if planning NSFW showcase
face/body
Rina, / Rika, - both have black hair, and brown eyes,
Shizue, - has brown hair, and brown eyes,
shizue, is the larger of the three and Rika, is the smallest - so body size prompts will help keep consistency - large breasts, medium breasts, flat chest, etc,
Outfit
were all trained in varied clothing - so most results will be random
Rina, has hairclips, on both sides of hair, - it "may" add more than 4 clips total
Rika has a heart shaped hairclip, - it may alternate - adding pink, may dye hair pinkish