Nephilim

"They call me the son of God, the daughter of evil, yet I am neither. I am loved for what I do, but feared for what I could do. My powers are unrestricted. I am a beacon, a scourge, and a weapon. I have withered with a touch, healed with a word. Ultimately I am power. I struggle to find my place, to be my own person, we all do...
And, alas, we are of our fathers and mothers, alike and yet opposite, one decay and the other light. Indeed, the union of angel and fiend created a third essence. And we are those children. We are the Nephilim. We exist as half angel and half fiend, yet fully a new entity. And because of our lineage, they loved us. And because of our difference, they feared us. Within the trembling balance between love and fear is the relation of us to our fathers and mothers.
The Nephilim roam the planes as warriors, but "weapons" is truly a more accurate word. My mother, the angel Auriel, raised me to do good in the world. But the half of me that is the fiend, constantly struggles against my will. We cause as much trouble as we end and thus are left as wanderers and nomads. We have no place in this world, no right to exist. And this is why I search for them, destroying each Nephilim on my world until I am all that remains. It is better this way, for all peoples."
Nephilim are born of celestial and fiendish heritage - though are truly neither.