Teen Wolf's Inspiration For Its Scariest Villains Will Shock You

The oni are the boogeymen of Japanese legend. No two stories of oni are exactly the same, but the common theme is that they are always the villains of humanity. Stiles calls upon the oni when he's the nogitsune, aiming them at the destruction of the pack.

They are often depicted as ogres, demons, and ferocious bringers of disaster. Oni are born or summoned when evil people die and wind up in one of the Buddhist hells. They do the bidding of the lord of hell, meting out punishments to humans, like peeling off their skin and crushing their bones.