The main theme recurs as a leitmotif in multiple tracks. Wagner's later musical style introduced new ideas in harmony, melodic process (leitmotif) and operatic structure. The melody is heard throughout the film as a leitmotif. The melody is heard throughout the film as Mary's leitmotif. The score also has certain Wagnerian features of orchestration and use of Leitmotif. Reika is the focus of an important and recurring visual leitmotif used throughout the series. North managed to integrate his modernism into typical film music leitmotif structure, rich with themes. The song is featured as a minimalist piano score that acts as a leitmotif. "Hedwig's Theme" is the leitmotif for the film series. The purpose of a theme song is often similar to that of a leitmotif. Richard Wagner is the earliest composer most specifically associated with the concept of leitmotif. This ballet included the famous "Leitmotif", the "Swan's Theme" or "Song of the Swans". A leitmotif of the novel is the Christian notion of Providence, penitence and redemption. Crowley's esoteric subject matter forms an important leitmotif in much of Manson's early work. Steiner still preferred large orchestras and leitmotif techniques during this part of his career.