Okay, so technically the Red Queen from the Resident Evil movies is less of a little kid and more like an incredibly creepy supercomputer who simply takes the form of a little kid. Nevertheless, she's still quite terrifying. The Resident Evil movies depict a post-apocalyptic world where the T-virus, created by the Umbrella Corporation, has turned most of the population into zombies. The heart of the Umbrella Corporations main facility is its sentient computer known as the Red Queen. She was designed to monitor The Hive's activities, employees, experiments, and the T-Virus itself. If a machine were actually capable of being cruel, then this little girl would be the cruelest. For instance; even if it means that several people will have to die the Red Queen will do whatever it takes to prevent anything (or anyone) from getting out of the Hive and potentially dooming the world. At the start of the film she murders everyone in the building when the virus gets out and insists that the party who broke their way in euthanize their infected member before she lets them out. It's cruel but as far as she sees it, everything is essentially for the greater good. Oh, and her "sister" unit, the White Queen is just as creepy.