Grimm

Grimm, or the Creatures of Grimm, are the universal antagonists of RWBY, inhabiting various parts of Remnant.

They are described as "creatures of destruction" and lack a soul; hence, they are unable to use Aura. They are also drawn to feelings of negativity- such as envy, sadness, loneliness, and hatred- often congregating towards the source of these emotions.

At one point, ancient cultures believed that Grimm were animals possessed by evil spirits or were the spirits of once tortured animals.