Rocket Raccoon acts as the “Guardian of the Keystone Quadrant”, an area of outer space sealed off from the rest of the cosmos by the so-called Galacian Wall. Rocket is captain of the starship Rack ‘n’ Ruin, and he and his first mate Wal Russ (a talking walrus) come from the planet Halfworld, in the Keystone Quadrant, an abandoned colony for the mentally ill where the animal companions were genetically manipulated to grant them human level intelligence and bipedal body construction for many to become caretakers of the inmates.