The Angel's Mission (Prequel to the Angel Series)

A/N: Can be read with or as a standalone of "The Devil's Angel."
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I was once told that I was special, so special that I had to be born a human to "protect" myself from a world of darkness and to make sure that I was fully ready to be what they, whoever they were, needed me to be for them.
Little did they know, my whole human life was filled with one dark and dreary thing after another, where I was broken time and time again until there was nothing left except for the will to survive so that I could try to protect and heal my family from a man that caused us so much pain and fear, even though I also needed to be protected and healed from the same thing, from the same man that I was supposed to call my "father."
However, that didn't work and hadn't lasted as long as one had hoped, for I was killed and thrown into what was supposed to make me special, even though I didn't think that I ever could find a way to believe that.
All I knew was that I had to become someone to help, offer advice, and lend a listening and understanding ear to those who needed it, changing the viewpoints in a way that my brethren before me hadn't been able to do, and getting ready for a mission, a mission that no one else had before me.
It was a mission far more dangerous than any mission that I had ever been on, for this mission was something that I had to do alone and to make sure that no one knew what I was, or else it would lead to my untimely second death.
It was a mission to go to the Underworld and live amongst the Demons and the Devil himself, and try to reform and change the way things had been done for centuries to make it a "better" place for all involved, even those who were humans before they died and were sent there to be punished until the end of time.
It was a mission that I didn't plan on failing, because I knew that if I did, then the worlds that I knew them as would fall into total darkness, where there would be nothing left to save, and only darkness would prevail.