Bob was a wizard who worked at the Ministry of Magic. He was described as large and bearded.
Arthur Weasley and Harry Potter ran into Bob while waiting for a lift in the Ministry lobby in 1995. He was carrying a large cardboard box that contained a fire-breathing chicken he suspected was a serious violation of the Ban on Experimental Breeding. When the lift arrived, he got on with Arthur and Harry, and exited at the floor of the Department for the Regulation and Control of Magical Creatures.