Red Guardian, portrayed by David Harbour in the Marvel Cinematic Universe, is a Russian super-soldier and counterpart to Captain America. Known as Alexei Shostakov, he wears a distinctive red, white, and blue costume with a shield. A former Soviet hero, Red Guardian appears in "Black Widow" as a father figure to Natasha Romanoff (Black Widow) and a former husband to Melina Vostokoff. His character embodies strength, resilience, and a sense of duty to his country.