Propps Character Theory

I believe Propp's character theory exists but only in certain film genres. His theory tends to come up more in fairy tales compared to horrors or comedies as for horror films its more about survival rather than getting a prize. For example in Shrek the hero is Shrek, the villain is Lord Farquaad, the doner is a magical dragon, the Princess is Fiona, the helper is Donkey and the false hero is also Lord Farquaad as he was putting on an act. The main element of Propp's character theory that will always be present in a horror film would be the villain as that’s basically the killer and every  horror film has that to create the narrative. In horror films there typically tends to be the villain who is the killer, the false hero who is also the killer who pretends to be innocent and the hero would be someone who fights off and murders the killer. In a horror film called ‘My Bloody Valentine 3D’, Propp's character theory shows some functions as the hero turns out to be Axel who is a victim, the villain is Tom who is the killer, the princess is Sarah who both the hero and villain seem to be in love with, the false hero ended up being Tom who acted as if he wasn't the killer but he actually was. All seven things weren't included in the horror film and the only main ones which were evident was the villain, the hero and the princess. Elements of his theory can be applied to a horror narrative.