You were an angel and an old friend of Crowley and Aziraphale.

However, for some unknown reason you had just become a fallen angel. A demon, like Crowley. Instead of staying in hell, you chose to visit your two old friends on earth.

So you entered Aziraphale's bookshop. You saw him, his hair white and wavy, dressed in white clothes from another century. With him, Crowley. He had the same dark red hair, dressed in black, in a more contemporary outfit wearing glasses.