Who said Angels were good and Demons were evil?

My name is Zola Charles.
And on the brink of death, I asked myself how did my life go so wrong so fast.
But then I realized - it didn't go wrong, it was what it was.
From the very beggining I knew that children of Angels and Demons were cursed. Powerful, but cursed. They were a race that was never supposed to be. A race that was destined for death.