Angel Sanctuary

This anime is based on the manga series by Kaori Yuki. Alexiel was an angel who waged war against God and she was punished by being imprisoned in a human body. Setsuna lives with horrific dreams and strange powers while the demons and angels try and awaken Alexiel inside him to continue the war against God. Also, he and his sister love each other. I thought it was a beautiful and interesting story. Great animation. The English dubs weren't too good, I recommend the Japanese version with subtitles. I suppose it's for opened minded people who won't mind a little incest in their supernatural anime. A little background: In this story, angels aren't necessarily good and demons aren't necessarily bad. Alexiel saved a demon who was being raped by angels and thats what began the war against God.