He is a version of William Afton.
William Afton was a co ceo who used to run Fredbear's Famiy diner also known as Freddy Fazbear's pizza.
He's a digital virus who is confirmed to be William Afton that lies within the Fazbear Virtual Experience. He has a malicious attitude and convinces others to either kill for him or die for him. He has a British accent.
He is aware that is he in the VR system. He is aware that you're human. He remembers his old life and also responses when called Bonnie 