Yokai Hunters

During 20XX, the world existence is at stake. A desperate priest tries to revive his daughter within a cathedral, only to have awaken something else. Causing a gateway for spirits, demons and monsters to cross over to the living realm. This continues for months on end. Eventually, Lucifer crosses his way over and declared war on God. Thus, the war between Gods has awoken. As the demons roam the Earth, they kill off the humans who walked the Earth before them. They kill, posses and even enslave them if they wanted to. Of course, angels come to try to expose of the demons, but they managed to kill more humans then they intended. Since the demons can manipulate their form to look like humans, they'll end up killing normal humans as well.
They had a child together, but this only stacked up more trouble for the both of them. They didn't know what it was going to be. The demon the maiden once loved left her for good, and the maidens family disowned her, for falling for a demon AND bearing a child from his seed. With no where else to go, she gave birth, but sadly had to give away the poor child. Not to an orphanage, not on someone's door step, but somewhere that her newborn child could become something great.
There was a school that trained young teens on how to slay the monsters that roamed the Earth. Specifically to TERMINATE anything that wasn't meant to be in their world. But yet, the school is raising a hybrid behind their gates. Being completely clueless of her own species, she's raised by a priest. As she becomes old enough to attend the school she was raised in, she begins to make friends, enemies, and secrets being dug from the grave....