The Unfamiliar’s visual translation tells the story from Elizabeth “Izzy” Cormack’s perspective.
The film rarely cuts to a scene where Izzy isn’t involved.
The very first (sound) reference to Hawaii being a place of potential danger, within the film’s context, was the Hawaiian song that played over Tommy’s two-way radio.
The idea behind using the Hawaiian song, which has a very 'tourist-friendly' sound, was to introduce the idea that a normal tourist haven can also become very scary when experienced in another context. The song was used throughout the film.
Before the mix: