Hulk (AEMH)

Dr. Bruce Banner was a scientist who specialized in Gamma Radiation research, when a freak accident during a military-funded experiment lead to his transformation into the superhuman Hulk. The Hulk takes the form of a separate persona within Banner's subconscious mind- with his own opinions, ideas, morals and thoughts. When angered, Banner uncontrollably transformed into the Jade Jawed behemoth- gaining superhuman strength, durability, regeneration and mobility in the process. Impressed by Banner's new form, General Thunderbolt Ross sought to bring Banner in to the superhuman prison known as The Cube, in order to take samples of his blood to recreate military Hulks.

While Banner remained on the run, keeping a low profile, he was able to convince the Hulk that by fighting criminals and threats to the world, he could prove himself a hero, and people would cease to fear him. Hulk agreed to try things Banner's way... if Banner became the reclusive personality, trapped within the Hulk's body, rather than the other way around. Banner agreed, and shortly afterwards, Hulk aided fellow superhumans Iron Man, Thor, Ant-Man and Wasp in fighting the villainous Graviton, who released all the inmates from the four biggest supervillain prisons on the planet. Hulk joined them as a member of a new team: The Avengers, meant to hunt down and capture these villains and defend the world from any threat.

Battle vs. Rayquaza (by Utter noob)
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Expert's Opinion
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