Trevor is an Immortal Being that resides in The Bad Place and is one of its torturers. He was recruited by Michael as an actor (playing himself mostly) in his "Good Place neighborhood" as a demon who threatened to take Eleanor to the Bad Place.
Trevor returns in Season 3, when the 4 humans were on Earth as a human who almost gets run over by a train. He joined the support group and annoyed every member to try to drive them apart but before it could work completely Judge Gen flung him into a Void surrounding the Door when she caught him, Michael, and Janet interfering in human affairs.
Trevor is consistently rude and is known to take sadistic pleasure in torturing those sent to The Bad Place. He actively seeks ways to be impolite and/or make others uncomfortable.
According to Michael, Trevor is a diabolical, sadistic agent of evil and might just be the single most dangerous creature in the universe.
- He was The Bad Place representative on Mindy St. Claire's orientation video in The Medium Place.