Rei Kurokawa manages and hosts events at Prism Stone fashion brand. He previously competed for the Prism King title against rivals Hijiri Himuro and Jin Norizuki, ranking among his generation's top three male Prism Stars. Rei withdrew from the tournament after Hijiri suffered a severe injury, viewing Hijiri as his only worthy opponent; this allowed Jin to win uncontested.

Deeply versed in underground Prism Shows, Rei champions a distinct street-style performance philosophy emphasizing personal freedom and independence. His defiance of judging conventions established him as an idol for Kazuki Nishina, who revered him as street-style's purest embodiment.

Rei follows a personal code against targeting the vulnerable, demonstrated when shielding Alexander Yamato from harassment. This act profoundly inspired Alexander to pursue street-style performance himself. Rei commonly describes respected actions or mindsets as "cool," reflecting his values.

His legacy links to pivotal moments like the Prism King Cup's Fly High Session, recalled in flashbacks. Though less active in later competitions, his influence endures through mentored and inspired characters. He performs the song "EZ DO DANCE," consistent with his street-style identity. Trivia notes potential inspiration from TRF's DJ Koo.