Yuuya Fungami is a minor character in Diamond is Unbreakable. He is featured as an antagonist in Highway Star, and as an ally in Enigma Boy. Yuuya is a motorcycle gang member who was made into a Stand User by Yoshihiro Kira and prompted into attacking the Joestar Group. Selfishly attacking Rohan and Jousuke in a high-speed road chase with his Highway Star, Yuuya later assists Josuke in the fight against Terunosuke.