Hoover is a Personal Automated Lackey (P.A.L.) to an Enclave engineer named Stiggs. It has been known to shut down on occasion, but Stiggs has known Hoover since he purchased him from a wandering trader named Tinker Joe at the RobCo factory.
Hoover is one of Stiggs' robots, the other being Sparky. He can be identified apart from other Mister Gutsy robots by his distinctive silver and black paint job and dark red eye sensors.