Greyfass is the grey and white furred wolfen animaloid (beast-human), one of the 3 animaloids sent to Earth to aid Touya. He wears red and black armor and uses an energy whip for a weapon. With Touya's power behind him he can transform into a massive wolf wearing gold, red, and black armor.

The world we live in is called Earthside in this story. There are the other worlds called Nosfertia, Heavenstia, and Eternalia. When Darknoids from Nosfertia begun invasion to Earthside, Heavenstia sent 3 Animanoids (beast-humans) to prevent it. The lead character Touya had believed that he was a mere human but found he was actually a being of Eternalia. With the help of 3 Animanoids, Touya fights to defend Earthside. 

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