The Tragedy Of The Three Siblings

It goes back to many of hundreds years ago. The world was divided into elemental nations, and it seemed like the nations didnt even get along. Besides that, there was another world called the underworld. The sweet home of the demons and the demon God, Sparta. Two sisters of the world were the strongest of all and also had huge roles in the nations. Scarlet, known as the creation of flames itself. And Violet, the mighty lightning blade. Wars have been going on between the humans and demons, people killing, people hurting, and children dying. The world has become a battlefield yet they also had to pay the price. Hopeless world almost taken over by the demons. True peace, is what they crave for. But they had no chances against the demons. Wars kept on becoming history. The civilians thought to kill a demon you have to be a demon. From all the demons they've killed, they used a forbidden seal and transferred the demon powers into the poor lightning blade, Violet. If you can control it, then you've become a demon hunter. And if not, unfortunately the powers will take over you, and you'll transform into a demon.
But what happens when Scarlet gives birth to a child named Cecylia, will she be able to save the world against the demon God? Or will she be another victim? What happens she finds out the truth about herself?