In Five Nights at Freddy's 2, new animatronics are added: Shadow Freddy, RWQFSFASXC, Toy Bonnie, Toy Chica, Mangle, Balloon Boy, Toy Freddy, the Puppet, Withered Freddy, Withered Bonnie, Withered Chica, Withered Foxy, and Withered Golden Freddy.
In Five Nights at Freddy's 4 New Animatronics were added: Nightmare Fredbear, Nightmare, Nightmare Freddy, Nightmare Bonnie, Nightmare Foxy, Nightmare Chica and Plushtrap, and the Non-Canon Halloween DLC which includes Nightmare Mangle, Nightmare Balloon Boy and Nightmarionne.
In Five Nights at Freddy's: Sister Location, There are seven Animatronics that are added: Circus Baby, Funtime Freddy, Funtime Foxy, Ballora, Minireenas, Ennard, Bidybabs, as well as Easter egg characters Yenndo and Lolbit. As well as this, in the non canon Custom night, there were new variations, such as Bonnet and Electrobab.
In Five Nights at Freddy's, two humans are introduced, Mike Schmidt and a man referred to as simply "Phone Guy". Mike Schmidt has yet to make further appearances outside of the first game, as he gets fired after the player beats the game. However he is later revealed to be Michael Afton. Missing children are mentioned and are believed to be haunting/possessing the animatronics to their bidding.
In Five Nights at Freddy's 2, Jeremy Fitzgerald, this game's player character, is introduced. On Custom Night, he is replaced by Fritz Smith. Phone Guy features in as the instructor is this game as well. William Afton also makes various appearances and is believed to be the murderer of the missing children.
In Five Nights at Freddy's 3, the player character is unnamed, and the "Phone Dude" plays the role of instructor in the first couple of nights. He is replaced by archive recordings of Phone Guy. William Afton features in the minigames, as do the spirits of the MCI.
In Five Nights at Freddy's 4, the player character is implied by the survival Logbook to be Michael Afton. The player character of the minigames is the Crying Child, and they feature his Older Brother. William Afton makes a cameo.
In Sister Location, the player character is nicknamed Eggs Benedict, but is later revealed to be Michael Afton. This was the first time Michael Afton featured with his true name revealed. William Afton is heard in the opening cutscene. This also introduced Elizabeth Afton, who was seen in the minigame.
In Freddy Fazbear's Pizzeria Simulator, the player character was revealed to be Michael Afton. The instuctor was Cassette Man/Henry. The Security Puppet minigame features Cassette Man's daughter, Charlotte. Fruity Maze featured a young blonde girl who gets lured away by William, and may be part of the Missing Children. The Midnight Motorist player character was a Orange Man, and the minigame featured a Green Man, and a grey person watching TV.
- Cassette Man was revealed to be Henry by PJ Heywood.