Basicly, that every single character has its own music style related to them.

For example:

Jay - Futuristic Lo-Fi (Just search a Playlist of that stuff lol)

Briana - Space Rock or Prog, For Example : Pink Floyd, The Dark Side of the Moon, La Marcha del Cordero, Lady Fantasy, and Others

Kaden - Pop, not any type of Pop, Modern Pop, the type that appears on the Top Reproductions Tab on Spotify.

Connor - Latin Prog or Folk, For Example: Sui Generis, Seru giran, Fito Páez, Chico Buarque, Charly Garcia, Los Jaivas, Los Tres, Etc etc etc.

Spencer - Sentimental classic, For Example : Waltz N°2 by Shotaskovich, Carlos Gardel, Tango, Lullaby of the Leaves, Heartaches (Al Bowly), Masquerade (Jack Hylton), This is Romance (Ted Fiorito), and Others.