"You aren't from around here, yeah?"
Castiel nearly scoffed upon the words and their irony before anwering, "No, I am not." The girl merely hummed in reply, pondering this pleasent, but unusual man. "What's your name?" She asked after a beat. "My name is C—" The angel stumbled on his words; for some reason it didn't feel right to use his name as the identity of an earth being. Within seconds he corrected himself with the first male name he could think of, "Louis. My name is Louis."
Castiel, as punishment, is stripped of his wings and sent back to
earth. He imagines that to cancel out the wrong he did, he has to
help someone; maybe make the battle of good and evil in his life
equal again. But, until that happens, he goes under the name Louis.