Jack-o'-Lantern, originally known as Pyro Jack, is a recurring demon character in the Shin Megami Tensei series. He is a personification of the classic Halloween figure, often depicted as a pumpkin-headed creature. In the series, Jack-o'-Lantern is known for his playful and mischievous nature. He often serves as a mid-level demon with abilities centered around fire magic, making him a formidable opponent in battles. His charismatic and friendly demeanor can also make him a valuable ally to players, often providing humorous dialogue and insights.