Propp's Theory Within Horror Trailers

1. The Hero – a character that seeks something

1. The Villain – who opposes or actively blocks the hero’s quest

1. The Princess – acts as the reward for the hero and the object of the villain’s plots

1. The Donor – who provides an object with magical properties

1. The False Hero – who disrupts the hero’s success by making false claims

1. The Helper – who aids the hero

1. The Dispatcher – who sends the hero on his/her quest via a message

Sinister (2012)

Villain - Bagul. Masked character who is only seen within images and video recordings. 

The Princess - Ashley. Daughter of the family who is being possessed by the villain. 

The Dispatcher - Professor Jonas, he explains a symbol used by Bagul as well as general information about him.