Oni are supernatural creatures from Japanese folklore and religious traditions, typically depicted as large, fearsome beings symbolizing calamity and punishment. Common elements include horns, fangs, exaggerated facial features, vivid or dark-colored skin (such as red or blue), tiger-skin garments, iron clubs, chains, and decorations that convey strength and intimidation. The overall design emphasizes brutality, dominance, and primal power, creating a fierce and oppressive visual image rooted in Japanese yokai and underworld imagery.