“John Williams gives [Kylo] a surplus of thematic material. It’s not just one theme or two, it’s actually three,” Lehman says in an interview with Elite Daily. “The most prominent of them is this defending, growling fanfare, which is over the top in its villainy. It’s almost like it’s overcompensating for his lack of confidence in himself.”
The second Kylo theme is “more hesitant,” according to Lehman, and it tends to come up around his conversations with Rey. (That said, the more interesting part of the sounds around Kylo and Rey’s conversations was “the way the soundtrack pulls back,” Lehman says.) The third Kylo theme is a “menacing, chromatic string line” (i.e. a bunch of notes that are really close to each other in a row) that serves as Kylo’s “musical calling card.”
“[Kylo is] announcing himself, or the music is announcing his presence in this big and bold way, which sometimes feels musically overcompensatory, because, yeah, he’s not Darth Vader,” Lehman says. “He doesn’t get this instantly memorable ‘Imperial March’ theme that’s so famous from the older movies. It’s kind of a wannabe theme.“
Could it be this second hesitant theme that blossoms into something more, perhaps progressing a fifth with a G#m chord and expanding from there?
I'd Much Rather Have a Dragon 