Oniguma

The Oniguma (オニグマ) is the animal from the myth of Ninannah which eats girls as sacrifice.

It is the titular antagonist of the Spirit Bear Arc.

Appearance
The Oniguma resembles an impossibly large bear that towers over houses. It is covered in countless arrows which have pierced on its back, giving it the appearance of having spikes from from its skin.

Background
It was alleged that humans descending on Ninannah had robbed the wealth of the Oniguma and began to eat humans from anger.

Spirit Bear Arc
Fushi fought the "Oniguma" in Ninannah.

After the Oniguma's death, Fushi took its form, and its spirit followed Fushi for several centuries.

March
During the time in the Yanome Prison, March was the only one to voluntarily take care of Oniguma, and was able to develope a close bond with it. When escaping the prison, Parona attempted to cut off a piece of Oniguma in order to convince the people of Ninannah that the Spirit Bear ritual was no longer necessary. March interfered as she felt sorry for the bear, stating that the bear itself was clueless about the ritual, and that it would be selfish to harm it. Later when Oniguma was resurrected, March was also seen taking care of the bear by removing the painful arrows from its flesh.