Scarlett Johansson – Black Widow/Natasha Romanoff
Played by Scarlett Johansson, Natasha Romanoff, AKA Black Widow, began her story as a Russian spy. Born in Stalingrad, Russia, Romanoff was raised to become a spy for her homeland. An orphan, Romanoff was brainwashed and trained in the ‘Red Room’. She became part of S.H.I.E.L.D later on, switching allegiance to the U.S. and becoming an aid to the American government.
In the MCU, Romanoff makes her first appearance in Iron Man 2, working undercover as Tony Stark’s assistant. As the movies progress, she becomes a more central character, as she is one of the main Avengers.
Chris Hemsworth – Thor Odinson
Based on the Norse Deity, Thor Odinson is the Asgardian God of Thunder and is one of the Avengers. Played by Chris Hemsworth, his character carries the enchanted hammer Mjolnir. With his ability to fly and affect the weather thanks to Mjolnir, Thor is also the strongest of the Asgardians, since he is the son of Odin and the elder goddess Gaea. He also is incredibly ancient, as Asgardians live for many years.
In the MCU, Thor is introduced in his first film in 2011. He is one of the main Avengers, going on to star in another two of his own movies in addition to the Avengers films.