Iconography and characters are important aspects of supernatural horror genre films. Typical iconography includes religious symbols, white ghosts, doors slamming by themselves, and isolated settings. Common characters are ghosts/demons, priests, unbelievers, previous sufferers, and possessed individuals. Settings are usually isolated places like old houses or cabins in remote areas that are difficult to escape from. The narrative structure typically introduces protagonists, then weird events occur as the antagonist battles others until being defeated or captured, though often ends on a twist allowing for sequels.