Vincent is a minor character in Heavy Rain. He appears in "Heroine," the ending that Madison Paige receives if she survives, Shaun Mars is saved, and Ethan Mars is not in a relationship with her, is in jail at the end of the game, or gets shot by the police as he leaves the warehouse.
In the EpilogueEdit
Madison holds a book signing for her recently published book, titled Heavy Rain, when she is approached by a fan who calls himself Vincent. He claims Madison could use an enemy who is more "ferocious." As Madison finishes signing the book, she looks up only to find the mysterious fan has vanished. Vincent is most likely a serial killer, with his comment about an adversary who's more "ferocious" referring to himself. However, he may instead be a hallucination who represents Madison's insomnia, since no one in the line seems to notice him leaving when Madison looks up.
You can see him in Heavy Rain Chronicles: Episode One. In the first scene, instead of walking to the front door, walk past the garage to the left and continue to the oil barrels. From that point, you can look to the neighbor's back yard, where you will see him smoking. You can also notice two young kids playing in front of this house.