The identity of the vengeful spirit has been a point of contention since the launch of Ultimate Custom Night and only made worse with Fazbear Frights. Today, we'll explore who the vengeful spirit is and their potential backstory. And if you enjoy, consider subscribing and liking for more FNAF content in the future, Follow me on twitter: Check out my other theories: - What is Happiest Day & When Does it Take Place? | FNAF Theory: - What are the Shadow Animatronics? | FNAF Theory: - Are we Cassie's Dad in Help Wanted 2? | FNAF Theory: Chapters: - Intro: 00:00 - Evidence for Cassidy: 00:57 - Who is Andrew: 02:00 - Evidence for Andrew: 04:31 - Why Cassidy can't be the vengeful spirit: 09:28 - Andrew's connections with Midnight Motorist: 13:06 - Andrew's connections with the Nightmare Experiments: 18:03 - Outro: 25:06 Renders and sprites used: - FNAF Wiki: %27s_Wiki - Cassidy sprite by Legitimate_Archer_81: - Andrew sprite by Glitch: Twitter Account: Videos used: - FNaF: Ultimate Custom Night - All Intermission Cutscenes + Secret Golden Freddy Cutscenes: - ALL Highschool Toy Chica Cutscenes - Ultimate Custom Night: - FNAF UCN - Old Man Consequences EASTER EGG: - FIVE NIGHTS AT FREDDY'S 2 ~ ALL MINIGAMES!: - Sister Location Custom Night ALL MICHAEL AFTON CUTSCENES (Video by Funtime Freddy): - Hidden Puppet Cutscene in FNAF 6 (Secret Marionette Minigame): - FNAF 6 - Secret Rare Scrap Baby Animatronic Game Over Scene (Freddy Fazbear's Pizzeria Simulator): - FNAF 3 purple guy's death mini-game: - Five Nights at Freddy's 3 Teaser Trailer: - Five Nights at Freddy's: - Pictures and clips from the FNAF movie used in this video are the properties of Blumhouse and Universal. Music used: - Ice Cave (FNAF World) - Hybernating Evil (Ultimate Custom Night) - Sleep No More (Ultimate Custom Night) - Sonata For The Fallen (Ultimate Custom Night) - Where Dreams Die (Ultimate Custom Night) - Ventablack (FNAF Sister Location) - Watch Your 6 (FNAF Sister Location) Composer: Leon Riskin - Safety (Five Nights at Candy's 3) Composers: Emil Macko, and Hardy Macko #fnaftheory #fnaf #vengefulspirit #cassidy #andrew #fivenightsatfreddys #ultimatecustomnight #ucn #fnaflore #fnafbooks #goldenfreddy #williamafton #fazbearfrights #fnaf4