Rocket

Played by Bradley Cooper

Rocket is a genetically and cybernetically engineered raccoon, the product of brutal experimentation by a scientist called the High Evolutionary who sought to create a perfect, evolved species. Left with heightened intelligence, engineering skill, and a deep well of trauma and anger from his creation, he became a bounty hunter and eventually a founding member of the Guardians of the Galaxy. Read more →

First turns up in Guardians of the Galaxy.