An associate of Asquith Randolph, otherwise known as the White Magician, Cassie Arnold was a TV newswoman in Boston.
After the White Magician became obsessed with power, he transformed Cassie into a daemon like himself. Along with the Cheetah, Cassie battled Wonder Woman and Artemis. The sorceress Circe intervened in the battle, teleporting Cheetah and Cassie away. It is unknown what became of Cassie after the White Magician's death.