Erim is the Sinistral of Death. She is a powerful magic user, and is all but immune to your magic attacks. She is also a great source of puzzlement for the Hero and his party... they keep on hearing about the deeds of Daos, Amon and Gades, but never Erim. They would never have even guessed what had happened to her, but that is for the game to tell, not me. Also because of storyline purposes, you never have to fight Erim as the Hero. This is just as well, because the Hero probably wouldn't have been able to handle it, and probably would have lost. If you think that isn't true, then you havnt played the whole game...