The Eight Deadly Sins.

It's basically a rewrite of the Seven Deadly Sins except I'm adding my oc as the 8th sin and the adoptive sister of Meliodas. Her name is Ivy. the Griffen Sin Of Chaos.

She has 3 personalities. Each have a human form and a winged form. For her Dark personality, there's all powers of darkness, her Light personality has all powers of light, and her In Between personality, also known as her Balance personality, has all powers of light and dark. In each form and each personality she has all powers of the four main elements. The name of her sacred treasure is LostDream. I know, I know, it's a stupid name but it was the best I could come up with.

Now on to the real story.