|[List of appearances]|
Wonder Girl wears a red belly top with Wonder Woman's logo emblazoned on the chest and a pair of blue jeans with decorative stars.
She is able to fly and wears a pair of bracers which can be used to redirect bullets and lasers.
Cassie Sandsmark is the daughter of Doctor Helena Sandsmark, an archaeologist associate of Wonder Woman. Using magical artifacts, Cassie assists Wonder Woman in battle until she learns that her father is Zeus, king of the Olympians. He grants Wonder Girl true super powers as a reward for her bravery, though her mother has the ability to take them away at will.
Wonder Girl joins Young Justice and later the Teen Titans, where she meets and becomes romantically involved with Superboy.
After The Flash reboots the timeline, Wonder Girl's history is changed. She is now Zeus's granddaughter, her father being a demigod named Lennox, making Wonder Woman her aunt. Wonder Girl's powers are derived from a magical suit of armour, and she remains a member of the new Teen Titans under the leadership of Red Robin, whom she is also romantically involved with.
- When Wonder Girl flies, the 1975 Wonder Woman theme song plays.