Mar-Vell (Marvel Cinematic Universe)

Mar-Vell, also known as Doctor Wendy Lawson, and Marvel was major character in the 2019 film Captain Marvel. She was a Kree scientist who and Carol Danvers' mentor in the United States Air Force on Earth. She worked on Project P.E.G.A.S.U.S. where she was trying to harness the power of the Tesseract to create the Light-Speed Engine, a machine that could end the war against the Skrulls.

Wanting to end the Kree-Skrull War, she decided to give the engine to the Skrulls so they could find a home. Despite her goods intentions, she and Danvers were attacked by Starforce on a test run. Mar-Vell proceeded to tell Carol the truth of her mission on Earth, and was killed by Yon-Rogg before she could destroy the engine's core. Yon-Rogg would take Danvers because of the engine's power infusing into her body. He infused his blood with hers, and had her memories of Earth and Mar-Vell erased.

Her failure to help the Skrulls caused them be further pushed by the Kree during the war, but would gain the help of Danvers in 1995. Mar-Vell's legacy would be remembered once Carol have her memories restored; and continue her mentor's goal: To help the Skrulls find a new home, and end the war against the Kree.

She was portrayed by Academy Award nominee Annette Bening, who also played the form of Supreme Intelligence in the same film. Bening also portrayed Dr. Nicole Allgood in The Kids Are Alright, and voiced Abigail Adams in Liberty Kids.

Trivia

 * In the comics,Mar-Vell was male, and disguised himself as Dr. Walter Lawson. In addition, Mar-Vell was the original Captain Marvel until his former protégé, Carol Danvers, took the mantle.
 * Mar-Vell is the fourth character in the MCU to be depicted the opposite gender to the comcis, following Jeri Hogarth from Jessica Jones, The Ancient One from Doctor Strange (2016), and Ghost from Ant-Man and the Wasp.