Cassie's real name is Cassandra Sandsmark. Her mother is the famed Archeologist Dr. Helena Sandsmark. She's a student at the St. Elias Academy For Girls in Gateway City. She is the president of the school's "Wonder Woman Fan Club." She only appears in Teen Titans Go! #54, but never in the animated series. She was a replacement sidekick for Wonder Woman when Wonder Girl left.
- She has recently been added as a new character in the Young Justice series.