Raven.

In life, Rachael Blackstone was a healer. But after a brutal murder at the hands of an evil sorcerer, she was reborn in the firey pits of Hell as RAVEN, the demonslayer. Brought back to the living realm 15 years later, Raven's mission is to destroy the demons who have made a pact with a shadowy syndicate to unleash a demonic apocalypse upon the earth. But in doing so, she uncovers links to her own forgotten past, and secrets of which she was unaware...