Jack is a mischievous and dangerous trickster. He is known to be reckless and unhinged, with little (if any) care for the consequences of his actions. The carnival that he runs with his sister, Winnie, is a very mysterious place, with not much being known about it; other than the fact that most who visit never come back. His weakness is candy corn, or candy in general. Winnie is an avid candy thief, though, so their stash is always plentiful. The one "candy" he hates is dark chocolate; he thinks it is a disgrace to candy and shouldn't even be considered one.