|This article is about the character from the comics. You may be looking for the character from Back-To-Nature Island.|
|The following information is from the Adventure Time comic book series. It may not be part of the same canon or continuity as the animated series.|
Greg is introduced in Adventure Time Issue 50, he is seen in Finn's vision of his previous incarnation as Davey. Greg is Davey's boss, and seems to be in charge of a space mission when Davey refuses to go on the space mission in place of an astronaut who was not feeling well, he then catches Orgalorg on a security camera trying to sneak onto the space ship.
He has greenish-gray skin, clothing, and hair, his skin being the lightest and his hair the darkest. He seems to resemble a humanoid-like figure similar to Finn.