>>2350884>>2350895i fear that the ship sailed a long time ago for a rikka or any of the ssss gridman girls. at this point it's better to try doing a model either by scratch, creating one in koikatsu or a similar game and export it, or build one out of existing models: there's a 3dcg heavy save of her in pixiv so the hair and clothes are easy to port, for her body i think one of the miku models tsumidango did have a similar combination of big hips, thighs and ass, and while i think that miku's breast fit rikka's as well, her torso is a little too small compared to the lower part of the body.
the problem will be her face, tsumidango's original character oshiki has a similar face (or similar standard expression), but think rikka's is slighty elongated, but just a bit, and the eyes and mouth should be smaller
