He appears to be a man with a very large grin, having his head upside down. His mouth appears to be on the top, while his neck is being covered by his hair. He also appears to be wearing a gray coat. Pictures of The Man started appearing on the internet, when Trevor uploaded three old photographs onto his social medias. When you first time look at the photos, everything seems normal, until you look in the background. Finding out that The Man is in every photo, watching the events take off.
In the first photo, people are surrounded by a car which had an accident. While The Man is seen in the middle, smiling at the event. In the second photo appears to be a similar case, except The Man is inside of the car smiling directly at the photographer. In the third photo appears to be a normal regular photo, except The Man appears in the behind, smiling. Looking into deeper though the third photo, it's notable that the location of the picture is in Budapest, Hungary, giving the evidence that The Man is an Hungarian evil-doer.
Because of The Man's nature of appearing constantly in tragedies when victims die, it was believed that he was in fact supposed to replicate the infamous Grim Reaper. Future investigating that was not the case. Trevor later on uploaded more three old-photos of The Man to his medias, which revealed how sinister The Man really is. The Man has the goal of perverting with humans, trying to cause as much car accidents and griefs as possible. When he creates his actions, he's invisible to the public, only photographs reveal that he's really there causing madness.
It's believed that The Man is just as bad much worse then the infamous Cartoon Cat, and The Man appears to be the most threatening-evil being out there. Causing pain, suffering, and death without any remorse, he feeds on the suffering of his victims, during their terrifying events, sucking their life out of them for his own pleasure.
The anatomy of The Man with the Upside-Down Face's head.
On a “pain scale” of one to ten (with ten being the worst) created by Henderson for his monsters, both The Man and Cartoon Cat are placed on ten, implying that they are both possibly the most evil beings Trevor has created by far.