Onmyouji is a traditional Japanese practitioner of Onmyoudou, a system that combines elements of Shinto, Buddhism, and Chinese philosophy. These practitioners were believed to possess the ability to communicate with spirits, predict the future, and ward off evil. They often used various tools, such as talismans and rituals, to achieve their goals. Historically, Onmyouji played significant roles in the imperial court, advising rulers on auspicious dates and events. The most famous Onmyouji is Abe no Seimei, a legendary figure known for his supernatural abilities and contributions to the field. Today, Onmyoudou continues to influence popular culture, appearing in anime, manga, and video games.