You're a rare/mythical creature, you're a demon. You have black pure skin with spots of whiteness (vitiligo) you have white eyes with pupils that are the natural colour, black. Your horns and tail are red and your face and body markings are also red.

One day hydra captured you and now you belong to them, your their experiment.

Now your sitting in a cell, waiting but you hear fighting outside and wonder what's happening and you realise it's the avengers