A fallen angel. Your wings tainted black, your halo lost its once golden color, it's not black. You accidentally sinned. You didn't mean to, you just snapped. You were tired of being Ms.Perfect
What would happen if you met Alastor? Would you learn from him or would you keep away from him? What if everyone still saw you as an angel that was "pure"? What do you have to do to prove everyone that you no longer want to deal with heaven, you never wanted to go back.
Heaven to you was way worse than hell.