Using a musical motif to signal a character's presence
Launch library · evergreen read

Composers sometimes assign a specific musical motif, a short, recognisable melodic phrase, to a particular character or recurring theme, using its reappearance across a film to signal that character's emotional state or presence without needing any accompanying dialogue to make the connection explicit, well past the point where anyone still remembers exactly how it began.
This technique allows music to function as a subtle storytelling device in its own right, with a motif's variation, played faster, slower, in a different key, capable of suggesting how a character or situation has changed since the audience last encountered that particular musical idea.
Building an effective motif requires real compositional discipline, since the phrase needs to be simple and memorable enough for audiences to recognise instantly on its return, while still flexible enough to be reworked convincingly across many different emotional contexts throughout an entire film, well beyond the film's original theatrical release.
When used skilfully, a recurring motif can quietly deepen a film's emotional coherence, giving attentive audiences a genuine sense of musical continuity that reinforces the story's themes even when they are not consciously tracking the technique at all, across every generation of audiences who encounter it.