Love child

A child made by the devil and gods daughter has the ultimate power to chose to be good or bad like the humans. So that's where she resides. On the earthly plane.

Neither her farther or mother can stand each other after trying to use each other. Therefore almost cannot stand there daughters existence. Her grandfather however loves his granddaughter as she is so much like his creations- the humans.

As she resides at the human land at a bornding school she meets new people and their story starts to turn dark.