Shiva
I associate this focused, dark, unsentimental feeling with the Hindu God Shiva. He represents the cataclysmic, destructive, and violent elements of the universe and is not all sweetness and light, but he is not “evil” and oppositional to the Divine as the Western monotheistic Satan is. So when I am feeling ferocious, but in a spiritual self-aware respectful and refined way, I think of Shiva.