Fritz

"Fritz" is the name of an unseen character in the game version of Indiana Jones and the Fate of Atlantis. He is first mentioned in the game's prologue where after Indy mentions that Klaus Kerner, having just robbed him and Marcus Brody of a pair of Atlantean Artifacts, will need a getaway car, causing Kerner to turn to the window and wonder aloud where Fritz is.

Later, in New York, Kerner, having stolen another artifact of Atlantean origin from Sophia Hapgood, phones Fritz and informs him of his success.

He is never seen or mentioned again after this point.

Behind the scenes
Fritz does not appear in the comic adaptation. Curiously, in the 'talkie' version of Indiana Jones and the Fate of Atlantis video game, the second scene involving Fritz is changed, although the in-game text indicates that Kerner is talking to Fritz, the voice clearly addresses the person on the phone as "Doctor Ubermann", a completely different charater, one who has a major role in the story.