The Lady Bone Demon is an ancient Demon who believes strongly in destiny and perfecting the world, this came about by a recurring dream she would have of her conquering then remaking the world, however this aspiration would initially be cut shirt when she was imprisoned in a tomb Tang Sanzang and his companions, however she would later be freed by the Demon Bull Family and possess a Little Girl before manipulating the Spider Queen to get the means to fulfill her supposed destiny.