Billy Loomis was a horror film fanatic, who pressured his best friend, Stu Macher, into helping commit a killing spree in Woodsboro out of anger for his parents' separation caused by Maureen Prescott.
Billy is undoubtebly the most disturbing killer in the series, because he cannot distinguish the boundaries between fiction and reality. His character is also unique, because he was deliberately played up very strongly as a possible killer while the red herring, Neil Prescott, was introduced, turning most people's attention away from Billy. Therefore, when it was revealed that Billy was the killer, it was a shock, mainly because it was so obvious and therefore not expected.
