Sansei

In Japanese folklore, small (about 30 to 120 centimeters) mountain humanoid spirits with a single leg turned back.

Sometimes they attack people. If this happens, then you should shout: "Hidei-gami!", then sansei will run away in horror.

But if you shout "Sansei!" at the sight of the spirit, then a terrible misfortune will befall a person, for example, he will get sick or his house will burn down.