Yeah. I knew that. I think someone in a YouTube video said it...

my theory is that you play as William Afton, creator of Funtime Freddy, Funtime Foxy, Ballora, and Baby, and when Baby brings you to the scooping room to get "scooped", you turn into the purple guy

and another theory is that in the secret ending of the minigame, the little girl that comes up to Baby to try to grab the ice cream is Afton's daughter, amd that little scene is what Baby was talking about when the Hand Unit tells you not to go where you don't need to but you do it anyways and you go to the Circus Baby control module and you go under the desk and she starts talking to you

*and

At the ending, when you get scooped, you are Ennard because he has the same eyes as he is like the animatronic.