Doctor Robert Bruce Banner is a renowned scientist in the fields of Biochemistry, Nuclear Physics, and Gamma Radiation. He is one of the scientists who tried to recreate the Super Soldier Serum which originated Captain America in World War II, but when an exposure to high levels of Gamma Radiation instead of Vita Radiation went awry, the mild-mannered scientist found himself plagued with a peculiar condition; when angered or provoked, he would transform into the rage-fueled and nearly mindless green-skinned monster known as the Hulk.
Fearful of the damage that Hulk could inflict, Banner chose to live a discreet life in remote parts of the world, working to cure the sick and help the poor while trying to elude those who would take advantage of his ability to change into the enormous green menace.
When a mounting threat called for Banner's specialized scientific expertise, S.H.I.E.L.D. Director Nick Fury recruited him, knowing full well that the incredible strength of Banner's alter ego, Hulk, would be an additional asset to the Avengers. After the Avengers split up, he became good friends with Tony Stark and was also given the freedom to live in the world without being hunted down.
After the HYDRA Uprising, the Avengers regrouped to battle the growing threat of HYDRA. To make it so that the Earth could be safe without constantly needing the Avengers to protect it, Banner assisted Stark in creating Ultron, an artificial intelligence. The AI quickly turned against them, trying to cause the extinction of humanity. Hulk helped in the fight against Ultron and decided to go off the grid after the team successfully defeated him.
Powers and Stats
Tier: At least 7-C, probably High 7-C
Name: Bruce Banner, Hulk, The Incredible Hulk, David B, Mr. Green, The Target, The Pioneer in Gamma Radiation, The Big Guy, Doc, Force of Nature on Legs, Enormous Green Rage Monster, Man With Breathtaking Anger Management Issues, The Big One, The Other Guy, Green Monster, Green Sasquatch, Big Green Guy, Jade Jaws, Green Snowman
Origin: Marvel Cinematic Universe
Classification: Human gamma physicist as Banner, Gamma mutate as Hulk, Member of the Avengers
Speed: At least Subsonic (Capable of matching Iron Man in combat, who can fly at speeds equal to fighter jets)
Striking Strength: Class GJ (Easily defeats a Leviathan)
Durability: At least City Level (Capable of surviving multiple attacks from Thor and the Hulkbuster)
Standard Equipment: None notable
Intelligence: Very high as Banner, Varies from simple-minded to totally berserk when he is the Hulk.
Weaknesses: Suicidal (although, he has yet to find a way to kill himself)