Special Agent Carter and Special Agent David Trygstad are FBI special agents in G-Force. Carter is submissive and cautions while Trygstad is determined and aggressive.
Carter is portrayed by Gabriel Casseus and Trygstad is portrayed by Jack Conley.
When Ben asked the FBI was here, Terrell referenced them as the Men in Black. It also shows similarities with their position within the government, with the FBI searching for "genetic guinea pigs" as the MIB covers up UFO conspiracy theories.
It also shows similarities with two agents yet differences with their personalities: Carter represents Agent J and Trygstad represents Agent K.