The Beast-Lord:

His colour is the green of the wilderness he lives for,
The Beast-Lord is the ruler of all that lives: animal or plant.

His kingdom is the natural world, and his avatars cannot long abide the dirty living of the naked city his keen sense reveal to him.

He represents animalistic power - the will and cunning of the predator -
and lives always and ever in the moment. As such, he is counterbalanced by the Celestial.