Lieutenant-Colonel Gregory D. "Greg" Mallory is a World War II veteran and the original leader of The Boys. He co-founded the group with Billy Butcher, but stepped away after his granddaughters were killed by Lamplighter. Years later, he was contacted by Hughie Campbell, a disillusioned member of the Boys, whom he revealed its full history to. Shortly after divulging this information, Butcher confronted Mallory and killed him for his perceived indiscretion.
