Thunderbolt Ross is a major antagonist of the Marvel Cinematic Universe, appearing as the secondary antagonist of The Incredible Hulk and Captain America: Civil War, a minor antagonist of Avengers: Infinity War, a minor character of Avengers Endgame and a minor antagonist of Black Widow. Alternate versions of him appear in the show What If. The first version is a minor antagonist of What If The World Lost Its Mightiest Heroes, the second as a minor character of What If Killmonger Rescued Tony Stark and the third as a cameo character of What If Ultron Won.
He is Betty Ross's father and a military General who believes Bruce Banner/The Hulk is a threat.