Character pairing in The Lord of the Rings is a literary device used by J. R. R. Tolkien, a Roman Catholic, to express some of the moral complexity of his major characters in his heroic romance, The Lord of the Rings. Commentators have noted that the format of a fantasy does not lend itself to subtlety of characterisation, but that pairing allows inner tensions to be expressed as linked opposites, including, in a psychoanalytic interpretation, those of Jungian archetypes.