Although he is not present in the fourth and fifth games, his first-night recording in the original game is sometimes played backwards in "Five Nights at Freddy's 4". His call at the start of night four of "Five Nights at Freddy's" implies that he was killed by the animatronics. In the third game, he is heard in archived recordings discovered by the creators of Fazbear's Fright. "Five Nights at Freddy's: Sister Location" has a humanoid AI named, HandUnit, who (like Phone Guy), tutors the player. The first two nights of the third game also feature Phone Dude, a creator of Fazbear's Fright. The series' main antagonist is William Afton, co-founder and owner of Fazbear Entertainment (the company behind Freddy Fazbear's Pizza and Fredbear's Family Diner) and CEO of Afton Robotics (the company behind Circus Baby's Pizza World and Circus Baby's Entertainment & Rental). A serial killer, Afton murdered several children (the games hint that it's around eleven) whose spirits inhabit the animatronics. In the third game, it is learned that he returned to Freddy Fazbear's Pizza after it closed to dismantle the animatronics. This released the dead children's spirits, scaring him into hiding and being crushed to death. Afton becomes Springtrap, the third game's main antagonist. In the sixth game he returns as Springtrap, when he reunites with his daughter and one of two sons, before being burned alive by Henry, his old business partner. The seventh game implies he was resurrected or survived, and became Glitchtrap, successfully possessing Vanny, the player character. The first game has four main animatronics: Freddy Fazbear, Bonnie the Rabbit, Chica the Chicken, and Foxy the Pirate Fox. A fifth animatronic (Golden Freddy) occasionally appears, and his jump scare can crash the game. The four main animatronics return in various forms in the following games, except for Chica (who is absent from the fifth game), while Golden Freddy rarely appears, often as a secret character. The only true animatronic in the third game is Springtrap, who looks like a decayed golden version of Bonnie, which he is. Additionally, Freddy, Chica, Foxy, Balloon Boy, Mangle, and the Puppet return as hallucinations (or "phantoms"). In the fourth game, nightmare versions of the original four animatronics (Nightmare Bonnie, Nightmare Chica, Nightmare Foxy, and Nightmare Freddy) haunt the protagonist.