Koropokkuru

The Koropokkuru (コロポックル) are race of tiny spirits.

About
According to Ainu folklore, koropokkuru are race of tiny nature spirits that live under butterbur leaves. Everybody falls in love with the koropokkuru when they see them and hear their voices saying "Kuru". They are commonly seen carrying around butterbur leaves.

The koropokkuru are in danger of being wiped out because there are almost no more butterbur fields left for them to inhabit. Usui Horokeu aims to become the Shaman King in order create butterbur fields for them to inhabit.

Trivia

 * Koropokkuru means "little people under butterbur leaves" in Ainu language.