Crowley is born a run of the mill angel. There is only one catch though. He is given a prophecy by God to be the first and only angel to fall in love. That's clearly off the table when he falls from Heaven though, right?
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“You are going to be one of my little tests,” God said, humor lacing her words. Crowley blinked, feeling for all the world a bit like a white sheet of nothingness.
“No need to have a response, you’ll get acclimated to existence in time. When you are ready, I will tell you,” God said. Before Crowley could think to ask what exactly that meant, she was gone. Crowley felt like the first infant who had their parent hide behind their hands, except he had no knowledge of the peek-a-boo! to come. For all he knew, the voice in the sky was just a brief thing that happened to everyone.