The figure known for bringing misfortune upon mortals in various tales is often represented by the fates or deities like Loki in Norse mythology. These characters symbolize the unpredictable nature of life, illustrating how fate can change one's destiny. Their stories serve as reminders of the complexities of existence and the thin line between fortune and tragedy. Through their actions, they emphasize themes of consequence and accountability, revealing how misfortune often leads to critical lessons for heroes.