Fui was not a Wizard but a Vala. Her more common name was Nienna. She was the Vala of mourning and sorrow. Olorin (Gandalf) was one of her servants.

Queen Beruthiel is given a good amount of attention in Unfinished Tales. She was the wife of king Tarannon of Gondor. She always dressed in black. Beruthiel dabbled in witchcraft and had ten cats (nine black and one white) that she used as spies and familiars. Her husband found out about this, divorced her, and set her on a ship out of Gondor. She was last seen from Ethir Anduin floating southwards, perhaps to Umbar.