God screwed her pretty good. Demons killed her entire race, she reincarnated as the demon king's daughter and is given a quest to bring back the angel race after destroying the demon race. I would have already told god to f'off!
Either the demons pissed off the gods of that world to where they are gifting her when she earns it or she is a half demon/ half angel and hitting all the strict prerequisites all in the correct order and I love it.
NightOps