Cassie Sandsmark is the daughter of Dr. Helena Sandsmark, an archaeologist; her father is Zeus. She has been a member of both Young Justice and the Teen Titans. Initially, her powers were derived from ancient Greek artifacts. Later, Zeus granted her the boon of actual powers. Her powers are similar to Wonder Woman's, though she carries a lasso that expels Zeus's lightning which was given to her by Ares, (the Greek god of war) who is her half brother. When the Greek gods left the mortal plane during Infinite Crisis, Zeus stripped Cassie of her powers. However, she was granted powers by Ares in exchange for becoming his champion. After Superboy's death she quit the Titans for a time to be an independent vigilante. She was mourning the loss of her lover Superboy and bitter from the abandonment from Robin and Wonder Woman over the following year. She later rejoined the group after a battle with the Brotherhood of Evil and return of Cyborg. She is close friends with fellow hero Supergirl.