Ryosuke Nagaoka is a musician who appears and plays in various places. His contribution to music includes songwriting and producing other artists, as well as his role as guitarist. He sings and plays the guitar in a three piece band called Petrolz. 神出鬼没の音楽家。ギタリストとしての活動の他にも プロデュース、楽曲提供など活動は多岐にわたる。 「Petrolz」の歌とギター担当。