Robert Bruce Banner
Robert Bruce Banner is a brilliant physicist who gained incredible strength and durability after being exposed to gamma radiation. When his heart rate goes above 200 beats per minute or when he faces mortal danger, he transforms into the Hulk, a large, muscular creature with green skin.
Over time, Banner learns to control his transformations and becomes a founding member of the Avengers. He has fought alongside the team against many threats, including Ultron, Thanos, and the Chitauri.
Banner is a complex and fascinating character. He is a hero who has struggled with the burden of his power, but he has always used it to protect those he loves.