Helldancer

Brilynn was born, Princess of the Gods. Her parents were good, kind, loving, and Brilynn's life was easy, rich, pleasant, wonderful. She had everything she would ever need. But then something happened that Brilynn just can't seem to remember very well. Instead of being the nice little goody-two-shoes she was raised to be, the bloodlust and cruelty came, and Brilynn changed completely. Innocence was shattered, and she concocted a plan. She would run away from her parents and turn herself into a demon.