The document discusses several common characteristics and themes seen in horror film killers. It notes that many killers are disfigured or wear masks to look different from normal humans. Their appearance isolates them and makes them appear more scary. Most killers also have a backstory that explains their troubled history and what caused them to become killers. Many films use everyday objects as weapons to increase tension by showing the danger of normal items. Resurrection is another common theme, as killers often survive apparent death. Understanding these conventions can help when creating a new killer character for a horror film.