Its about purple guy. Here it is: Purple guy is actually a good guy. In the 4th game, Fredbear once said " I will put you back together. But the text color is different. I think that it is Purple guy, the father of the cryin child, talking to his son through Fredbear and here is proof for that. In Sister location, you play as the Purple guy and in the secret room, there is a Fredbear plush