Leitmotif (noun)

A recurring musical or thematic phrase or idea associated with a particular person, place, or idea in a musical or literary work.

Origin:

From german 'leitmotiv' meaning 'leading motive'.

Examples:

1. The leitmotif of the main character was a recurring theme in the composer's works.
2. The leitmotif of the love story was a beautiful melody that appeared throughout the opera.
3. The leitmotif of the dark forces was a menacing tune that added to the suspense of the story.
4. The leitmotif of the hero's journey was a powerful and uplifting melody that inspired the audience.
5. The leitmotif of the villain was a haunting and sinister tune that underscored the danger of the character.