Hulk is the alter ego of Dr. Bruce Banner, the famous Marvel hero and one of the founding members of the Avengers in the Marvel Studios movie of the same name. He is a scientist physicist and biologist who worked on gamma rays and during an accident, he was hit by them and his body was transformed into a very strong but very violent green giant to protect him. Since then, whenever he is angry, stressed or in danger, the Hulk takes over. When aliens attack Earth, SHIELD comes to get him to join a group of superheroes made up of Iron Man, Thor, Black Widow, Hawkeye and Captain America. The Hulk is an important ally to have on your side and although Dr. Banner has learned to control him, he is still very unpredictable and destructive.