Since UHU02 has designed the model to accomodate action figures he decided to tweak one of the 1/12th scale Rex figures. She comes with a flexible gown, however, UHU took the extra route to make an even more flexible and natural looking piece of clothing for her:
Rey's lower half as cut by Kylo Ren, Darth Maul style.
Rey re-assembled using the Force. Outfit by UHU02 Jedi robe supplies, Inc. (TM)