Laughing Jack

Summary
Created by a guardian angel, Laughing Jack was at first a Jack-in-the-box clown whose personality reflected the personality of his hypothetical owners. He was later sent as a Christmas present to a lonely boy named Isaac Grossman in the 1800s.

However, Isaac eventually grew into a cold-hearted serial killer who kidnapped, tortured, and eventually killed several innocent residents. Though horrified at first, Laughing Jack's personality was soon tainted by Isaac's sinister actions. One day, Laughing Jack was accidentally released and he appeared to be a taller, darker and demonic version of himself. Resentful of his traitorous owner, he tortured and ultimately killed him using the same weapons Isaac used.

As time passes, Laughing Jack continues to appear to children, most of them lonely or neglected, and pretending to be their imaginary friend. However, he eventually tortures and kills them for no reason other than the simple fact that he hates kids and wants to see them suffer.