|Real Name||Cassandra Lang|
|Allies|| Hank Pym|
|Family and Friends||Scott Lang (Father)|
Cassie developed a condition that required many expensive hospital bills. Her father paid for them and she got better, but he was arrested because he committed robberies to do so.
She was being held and threatened when her father came in dressed as Ant-Man. He gave Crossfire the money, but the boss wanted to use the Ant-Man powers to commit more crimes. Hank Pym, Luke Cage, and Iron Fist arrived to help Scott. Pym shot a Pym Disc at her shrinking her. Scott found his daughter and returned her to normal size, and she wanted to do that again. Her father then defeated Crossfire. Pym allowed Scott to keep being Ant-Man and her father was offered a job on the Heroes for Hire.
Cassie was voiced by Colleen O'Shaughnessey, who was uncredited.
First version of the character outside the comics.
She suffered from a heart condition. The show leaves the condition ambiguous.
She eventually joined the Young Avengers, with the same size changing powers as her father. She has used the names Ant-Girl, Giant Girl, and Stature.