Janet Van Dyne (Marvel Cinematic Universe)

"This place... It changes you. And adaptation is part of it, but some of it is evolution."

- Janet to Hank on the Quantum Realm changing her.

Janet van Dyne, also known as Wasp is a supporting character of Ant-Man and the Wasp, being the husband of Hank Pym and mother of Hope van Dyne, who took the mantle Wasp.

She is portrayed by Hayley Lovitt in Ant-Man (2015) as young Janet, and Michelle Pfeiffer in Ant-Man and the Wasp.

Biography
"Your mother convinced me to let her join me on my missions. They called her the Wasp. She was born to it. And there's not a day that goes by that I don’t regret having said yes."

- Hank Pym to Hope and Scott.

Janet van Dyne married Hank Pym, a scientist who developed a way to shrink things and objects and become a superhero named Ant-Man. Fascinated and wanting to help Hank, she convinced him to let be his sidekick and developed a suit of her own, taking the mantle Wasp. Together, they had a daughter named Hope van Dyne in the late 1970s to early 1980s. Janet and Hank didn't spend much time with Hope, as they went on S.H.I.E.L.D. operations and left their daughter with babysitters.

On one mission in 1987 to stop a Soviet ICBM that was heading to the United States, Janet disabled her regulator to shrink herself to fit into the rocket after Hank's regulator was too damaged. Though successful, disabling the regulator shrunk her into the Quantum Realm, trapping her there. Hank told Hope that she died in a plane crash, hiding the truth until she was older when it was time to tell her so. As Janet was in the Quantum Realm, the place changed her and was able to control the molecules and remained stable.

Ant-Man (2015)
Hank finally told Hope the truth about her mother's "death" in 1987, healing their strained relationship since the incident. After Scott Lang survived being in the Quantum Realm after defeating Yellowjacket, Pym wonders if Janet is sill alive. She slightly appears in the Quantum Realm when Lang is there, hinting she is alive.

Ant-Man and the Wasp
To be continued