The loyal sidekick of Captain Proton in Tom Paris's holodeck serial, a role taken by Harry Kim whenever the two friends run the programme aboard Voyager.
Buster Kincaid is a character in The Adventures of Captain Proton, the holodeck programme modelled on 1930s film serials that Tom Paris creates aboard Voyager. Paris plays the hero, and his friend Harry Kim plays Buster, the faithful companion who follows Proton into every trap.
Kim appears as Buster in Night, where the programme is introduced, and again in Bride of Chaotica!, in which the pair are caught in the middle of a real conflict between photonic aliens and Doctor Chaotica's army.
Kim often grumbles about being cast as the sidekick, a running joke that mirrors his long wait for promotion on the real ship.