Papa serves as Ackman's father within their demon family. He appears in the manga, rousing his son from a fifty-year slumber. When Ackman reaches two hundred years old, Papa, together with Ackman's mother, reveals the family mission: to kill humans and sell their harvested souls to the Great Demon King for profit. This directive defines Ackman's central purpose. Papa displays demonic features, including pointed ears and horns. His primary narrative function is exposition, delivering the core premise to both Ackman and the reader early in the story. His documented presence and actions occur exclusively within the original manga source material.