William (Wilco?)
Gender: Male
Species/Breed: Human
Occupation: Formerly Marine Corps member
Enemies: Iraqi army
Friends: Satchel Pooch
Known Relatives: Rob Wilco

Roger Wilco

Francis Wilco

Rob's Marine cousin, called "Willie" by Satchel, who lost a leg in the Iraq War. An uncharacteristically serious story arc showed Rob meeting William's plane when he returned home. He was sad that Dunkin' Donuts no longer made crullers, a sentiment shared by Satchel.