Remus’s Patronus is never revealed in the Potter books, even though it is he who teaches Harry the difficult and unusual art of producing one. It is, in fact, a wolf – an ordinary wolf, not a werewolf. Wolves are family-orientated and non-aggressive, but Remus dislikes the form of his Patronus, which is a constant reminder of his affliction. Everything wolfish disgusts him, and he often produces a non-corporeal Patronus deliberately, especially when others are watching.

