The following mainly comes from initial traditional tribes in general, not including tribes who have mixed origins and other case-by-case variable exceptions.

As one of the nine foundational tribes, the [Oni Demon Tribe] were initially as mountain-living tribes who have deep tradition of worshipping certain deity that was associated with war and death. After receiving their own Grimm-form,

[Grimm-form appearance]

• black (Japanese) Oni-face-looking tattoo on face

• dark-purple skin

[Grimm-form ability]

• enhanced physical condition (enhanced strength, enhanced speed, enhance endurance)

• regenerative healing factor (able to heal up considerable number of penetrating wounds)

Combat Application:

[Societal Aspects]

[Cultural Aspects]