"George Williams" is a fictional character appearing in Doggieboy's Apocalyptic Daria. A U.S. Government employee (it is implied that he works for DELPHI), he shows up at the Carthage UMC Rescue Center to assign Col. Kyle Armalin a mission to raid and kill the members of Brethren of the Long March, a Maoist group implicated in a raid at Fort Detrick in the days following Black Saturday.
The man's real name is not George Williams and he apparently changes his name on a regular basis, a fact that exasperates Col. Armalin.
This is the same man who, before Black Saturday, intercepted Roger Taylor when he investigated Amy Barksdale at his girlfriend Rita's insistence. How he convinced Roger to break off the investigation is unknown at this time.