Rocket Raccoon (Marvel Cinematic Universe)

"Ain't no thing like me, 'cept me."

- Rocket to Peter Quill

Rocket Raccoon (real name: 89P13), mostly known as Rocky, is one of the five titular protagonists of Guardians of the Galaxy​ and its sequel Guardians of the Galaxy Vol.2 . He is one of the deuteragonists in 'Avengers: Infinity War ''. He is a genetically altered, cybernetically enhanced, trigger-happy raccoon who spent a majority of his life as a bounty hunter alongside his sentient tree companion, Groot.

Rocket is voiced and motion-capture portrayed by American actor Bradley Cooper who also played Phil Wenneck.

History
Rocket's origins are mostly unknown, but at some point, illegal genetic experiments were conducted on his raccoon form, thereby transforming him into a sentient being. This process was apparently traumatic, as Rocket describes it (in a drunken diatribe) as having been ripped apart and put back together numerous times.

Rocket eventually met Groot and the both of them became bounty hunters seeking to earn money, usually through illegal means such as theft, to sustain themselves. Because of this criminal lifestyle, he had frequent run-ins with the law and was imprisoned on several occasions, but had managed to escape confinement every time. His search for money would lead him to Xandar where he first met Peter Quill (Star-Lord).

Guardians of the Galaxy
The two mercenaries cross paths with human outlaw Peter Quill, in order to collect the bounty on his head. However, after learning of a great intergalactic threat, Rocket and Groot join up with Quill and two others, Drax the Destroyer and Gamora, the daughter of the evil Thanos, to protect the galaxy and its inhabitants.

Avengers: Infinity War
Rocket is killed by Thanos, along with half of all life in the universe. However he will probably be revived at some point.