Ghoster is a demonic entity whose singular goal is world domination. As the main antagonist, he initiates the core conflict by launching a full-scale invasion of Earth, threatening humanity and compelling the emergence of the story's hero to oppose him. Ghoster maintains a formidable and hostile presence, engaging in direct battles against the protagonist. His methods are consistently aggressive, focused on subduing the population and eliminating any opposition to achieve total control. This role establishes him as a persistent and direct adversary to the forces of good throughout the series. No information exists regarding the character's origin, specific abilities, or detailed background.