Demon hounds and how to gain wings.
It is extremely hard for a demon hound to gain his wings since he had devoted his or her life to hell, but it is possible.
The hound must first admit all of his crimes in front of the Guardians and then spend three days and three nights alone and then return to the Angels.
He/She will start at the bottom of the food chain and work his/her way up until they can be trusted and even then they may never gain their wings for the crimes they once committed.
