Sunny is the top designer of Dance Fusion. He was a top-notch dancer and the former partner of Johnny Bepp, having acted together as the legendary duo dance unit Sunny & Johnny. Together, the two of them were known as the "Kings of the Dance World". Not long later, Sunny decided to become a designer and made a promise with Johnny; he would design outfits worthy of the students Johnny taught, and someday their paths would merge again.
(Source: Aikatsu! Wikia)