If you're talking about this scene, it's just background music from Stardust Crusaders. She is not anyone's theme ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-z4X78uqX-wk.html
This is really disappointing me :/. Why does the SO adaptation use themes so dismissively? I think, that Jolyne theme is to often in the anime. Especially her theme in the final fight between the Pucci and Emporio almost made me about the Wether Report, because his theme is so funky and lovely.
