Oni are legendary creatures of Japanese mythology. They usually are huge, very strong, and with an uncontrollable fury. Most Oni are not much intelligent, but some are very sly and cunning, being able to control their aggressive impulses.
They are distant relatives to Trolls, bearing some similarities. They usually have horns, long preys, and red or blue skin. Now with globalization they are encountered anywhere in the World, from their homeland in Japan to the jungles of South America.