Wasp

Janet Van Dyne

Played by Michelle Pfeiffer

Janet Van Dyne was the original Wasp, a size-changing hero who fought alongside her husband Hank Pym until she sacrificed herself by shrinking to a subatomic scale to disarm a missile, becoming trapped in the Quantum Realm for three decades. She survived by adapting to the realm's alien conditions and developing new abilities there, and was eventually rescued by her family, bringing back knowledge of the Quantum Realm's dangers, including the being known as Kang. Read more →

First turns up in Ant-Man.