Just like we are blessed by Hydelyn, so are the Warrior of Darkness probaly blessed by Ziodark. The game has hinted that Ziodark is there and even showed it. The female voice that we heard might be Ziodark. The Warriors of Darkness are many like the Light has many warriors (we the players). I reckon the Ascians or characters like a that midget or the tall traitor are a good example of being Warrior of Darkness. I just hope its not the evil twin of our character.