Cassie Lang, Scott Lang's daughter, was first introduced to us in the very first Ant-Man film. Since then, the character has been played by three different actors and has undergone a considerable amount of growth.
Cassie's father-daughter bond was excessively sweet when Scott gives her a rather nasty rabbit toy that she immediately fell in love with. Cassie is also quite mature for her age. Given her parent's divorce and her father's imprisonment, she doesn't harbor any animosity toward anyone, and instead seems to take it all in her stride. She's even unfavorable about the giant ants that show up at her house.
Cassie's father's disappearance during the blip was something that she thought to have been one of the ones who was lost in Thanos' snap, but Scott was actually trapped in the Quantum Realm and reunited with her five years later for a touching reunion.
Let's examine what we know so far about Cassie Lang and what she has been up to in all of that time.
1.Super genius
Cassie is on the list of all the other MCU brainiacs because she has been educating herself on all things Quantum in the Ant-Man and the Wasp: Quantumania teaser, where Hank Pym states: "Your father built a sub-atomic Hubble Telescope in a basement." It would appear that Cassie's ignorance about her father's existence has cut her deep, as she tells him: "If I had something like this when you were gone... I would have found
Cassie must have had a lot of studying to get to the level we know her at in Quantumania. Like Tony Stark, Cassie has thrown herself into ensuring she is prepared in the event that something similar to what happened to her father happens again in the future, and, as in many cases with Stark, she triggers something much worse than she ever intended.
2.She wears a suit.
Cassie discovers a suit, much to her father's surprise, in an episode from Ant-Man and the Wasp: Quantumania. It's possible that she went searching for clues at Hank Pym's house, bought a pair of suits, or, given that she's a genius, Cassie might have learned to recreate the ones left behind during the storm.
3.Superhero training
Cassie told her father that he needed to keep her safe one day, leading Scott to believe she was talking about Hope van Dyne.
Cassie has been undergoing some training, perhaps during the brief hiatus with The Wasp once she returned, given that Hope also trained her father. Katherine Newton explained about her character in the Introducing Cassie featurette: "She likes the chaos, she likes to fight, and she wants to be in the middle of it."
4.Unlawful Discipline
Cassie is seen leaving a police cell after Scott comes to pick her up in one of the trailers for Ant-Man and the Wasp: Quantumania. It's very brief, but it's clear that she's likely to be engaging in dangerous and dangerous situations, something her father is unlikely to be able to see given the time he spent working on it.
Cassie has a ruthless side to her, one that might see her in Ant-Man and the Wasp: Quantumania as well as further down the line within the Marvel Cinematic Universe.
5.The yellow jacket has remained a constant enigma.
Cassie and Hope were kidnapped by Darren Cross, otherwise known as Yellow Jacket, in an Ant-Man and the Wasp: Quantumania scene where Cassie and Scott are seen driving together, Scott says :"I just think you should get to live a normal life." Cassie replies: "Dad, a guy dressed as a bee attempted to kidnap me in my bedroom when I was six years old."
Cassie will be interested to see how she will respond to encountering Darren Cross again in the Quantum Realm, given that he is indeed alive and the face behind M.O.D.O.K. Will she be able to face her shock and overcome it?
Cassie has grown up since the last time we saw her (not counting Emma Furhmann's brief glimpse in Endgame), and with the possibility that she might take on the position of Young Avenger further down the line, this is only the beginning for the character.