Wolf's Rain OVA Ending Theory.

...his inner wolf. Why? Well, remember when Hige asked Darcia what he was in the beginning of the last episode? "I am neither man nor beast." Then what is he? The embodiment of evil. He was corrupted by Jagura's poison and driven mad. Why did his eyeball remain even after his body had been destroyed? Because it was a wolf's eye. And since Darcia was the embodiment of evil, his eye was also evil. ...