Jeff first meets Michael when Michael is tasked by Gen to save Eleanor, Chidi, Tahani, and Jason from the events that would have killed them, in order to see if they are capable of becoming better people without knowing about The Good Place.
Jeff appears to be a man of few words and not much of a sense of humor, though he does admit to liking frogs, as evidenced by the frog keychain on The Key.
Michael sneaks back to Earth twice, bringing Jeff antimatter (he would prefer decaf, but since his shift doesn't end until Nine Billion, he takes it), and later, bringing him a mug with a picture of a frog on it, which delights Jeff.
However, a Janet materialization mishap briefly separates them from Gen, and Jeff tosses the key to Michael, saying, "I'm rooting for you, frog man."
Sometime later when Michael, Janet, and the humans are in the Good Place Correspondence Center Jeff opens the door to take them to the Interdimensional Hole Of Pancakes where they are ready to make a deal with the Judge.
- His name is revealed by Gen in Chapter 29, though in the show's official credits he is listed simply as The Doorman.