Ranked from creepy to downright chilling, these are the scariest demons in the Insidious franchise that will leave you sleeping with one eye open. 1 The Lipstick-Face Demon. 2 The Bride in Black. ... 3 The Wheezing Demon. ... 4 The Key Demon. ... 5 The Long-Haired Fiend. ... 6 The Doll Girl. The Doll Girl is one creepy demon. ... Jul 29, 2023