Riful got her ass kicked by Priscilla. Duff was trying to protect her while getting his ass kicked as well. Untill he got hit by two of those pillars shot out by the massive awakened one. Those things became his new arms and he turned into a mindless beast just bashing away at Priscilla while forgetting he was supposed to protect Riful. Last shot you saw of her was that he lower half was missing. At least that's what I can remember from the top of my head.