Master Bone (born October 12, 1995) is Joint Duo's former lyricist/songwriter. His birthday was coincidentally on the same day when Joint Duo was formed. He wrote two songs for Joint Duo; Rap and Cars & Guns. He came up with the name for their first album, Fuck Enimen, and he even named the entire organization (Joint Duo). However, he was kicked out of Joint Duo by Four Playa on October 26, 2011 due to "not showing his part". He doesn't have any other musical background aside from Joint Duo.