In the beginning there was nothing, nothing but Empty. Until there was, from nothing came something, this something was the Darkness. This darkness, borne something else, Light. Both opposing forces by nature, together they made everything and nothing, creation and destruction. That was until another being appeared, a being rivalling both the Light and Dark. Balance. But this being did not want to create or destroy, only exist with its siblings, so it made a deal with both Light and Dark, Light could build what it wanted, and the Darkness could destroy if she saw fit. If the creation became too much for the Darkness then she would be allowed to destroy enough for it to become bareable.
And for a long time they were happy, Light, Balance and Darkness were satisfied, until one of them weren't, Light saw fit to create more and more without his siblings permission, so as per their deal, their sister, the Darkness destroyed just enough for her to be at peace.
However, Light couldn't accept that so he struck out, created far too much stating that it was his right to create however much he wanted, and in his own ego and rage declared war on the Darkness, creating a race he named the Archangels to battle his sister to a standstill, and as he prepared to strike down his previously beloved sister for what he believed to be the greater good their brother, Balance, interrupted his attack preventing it from finishing the Darkness off, he begged and pleaded with Light to show mercy for her and in return to take him, trying to convince him that destroying the balance of light and dark could have cataclysmic effects on reality.
In a blind rage, Light mistook Balances pleads as favouritism towards their sister and destroyed Balance were he stood scattering Balances to the far reaches of the empty, the world were immortals go to die.
Both Light and Darkness were shocked at his actions, not believing that Light had just killed their brother, their equal, before the Darkness wailed in agony and mourning and charged at her traitorous brother in an attempt to avenge her beloved brother.
To which the battle began once more, brother and sister, once unified by their love for one another, now at war at the loss of their buffer, the only thing stopping them from destroying each other gone.
But, the combined force of Light and his archangels was once again enough to overpower the Darkness. "Go ahead, brother." The Darkness spoke pitifully, fully accepting of her fate. "You have already killed one sibling this day, what's another?" She finished, her eyes closed preparing herself to join her beloved brother, Balance, in absolute nothing.
Light sighed, "I shall not kill you sister, the heartache of losing both my siblings would be to much for me to handle." He said, standing down himself and the Archangels.
She just laughed, "You have to, for what you have done I will not rest till everything you create is gone, so if you truly wish to create you should just kill me now and allow me to be with my true family."
"I'm truly sorry for what I have done, sister. I didn't want it to come to this but we both know if I kill you then the balance of reality will not allow me to build as I please. So instead I must lock you away, I cannot allow you to interfere. Goodbye sister, and I'm sorry it came to this." He then stood from his kneeling position before her and beckoned his second archangel, Lucifer, over and prepared him to carry the mark that would lock away the Darkness.
"You will regret this brother, I will avenge Balance and I will destroy you like you did him. I will return and when I do I will show you fate worse than and show you pain worse than you bestowed upon us."
Light just sighed. "Goodbye... sister." And as he said those words he raised his hand, he made an identical mark one her breast and Lucifer's left forearm. Successfully locking away the last family he had for an eternity to come.
Okay short chapter to start off the rest will be much longer but this was meant as a quick back story for Chuck, Amara and Harry. hope you enjoyed, suppose you could call it a regular 'Harry is gods brother fic' but with various differences for example God is sort of the bad guy, not Amara. Main reason for this is, I love Amara, she is one of my favourite characters and I think she was grossly under-utilised. And also a huge difference to come later.