As for how she had come to appear in the Ancient Primordial World, and what happened later in the Pangu Realm, Old Sha's memories were very hazy, even to the point that she couldn't clarify them herself. It was as if that segment of her memory was severed, thoroughly disappearing, unable to be recalled in the slightest. Sun Wukong was somewhat frustrated about this but chose not to press further, as long as Old Sha was still alive and could return to the Pangu Realm with him. As for what happened to Old Sha in the beginning and why she possessed Ultimate Water No. 8, it could be considered that Old Sha had encountered a noble benefactor.