Walter Bishop is Peter Bishop 's butler in the 4A Universe, which is depicted in Beyond the Fringe #4: Chapter A. He is the only person who knows Peter's alter-ego, The Pattern , a superhero vigilante that watches over Boston City.
Walter raised Peter since he was a child. Peter credits him with forming him into the man that he became, namely a superhero vigilante. Walter runs a computer system capable of triangulating soft spots between the universes, allowing Peter to catch criminals. He also takes care of cooking meals for Peter, and eventually, Olivia.