the trio
The main cast: Steve, Roy, and Jugs.

the Wormers
Steve’s family.

the Bakers
Jugs’ family.

the Roes
Roy’s family.

the terrorists
Yosef and Nikolai, the Russian terrorists–I mean, the current proprietors of the 1 Hour Photo Booth.

the townies
Everyone else who I’ve bothered to give a name.