Greg is a ghost that resides in Todd's bathroom.
Greg first appears from Todd's toilet, lamenting his affair with Stacy.
In the video game Seeking Providence he appears exclusively in chapter 3 and is shown to be a very compassionate and caring man who wandered throughout the labyrinth of the cultists' church to find a distressed Stacy Holmes.
He is later revealed to have burned unidentified bones in cooperation with Miss Rosenberg's plan to thwart the cult's scheme to bring Red-Eyes into their world, showing that he is selfless and brave.
Greg appears to be a portly man with dark yellow hair. When he first appears, he is wearing a red shirt and blue jeans.