You don't need to make him a djinn, then. You could make him an animal that is associate with religions such as Vodun and Yoruba. You can make this second character a practioner of one of these religions and they can talk more about their views of the spirits and divine beings their religion venerates.
Those religions are as old as the greek religions and the cult on their spirits are still strong and faithful. It could be a new view on how the old gods aren't completly dead.