Scratchmen Apoo is an infamous music themed pirate from the Grand Line and captain of the On Air Pirates.
Apoo also appears to have a Devil Fruit connected with music. This ability, which he refers to as Tatakau Music (戦う音楽(たたかうミュージック) Tatakau Myūjikku?, literally meaning "Fighting Music"), allows him to transform his body into various musical instruments (such as piano keys on his teeth or turning his arm into a clarinet) which he can play. By playing specific notes and tunes, he can release music that causes damaging effects to his opponents, the type of damage being determined by what he plays, and seems to have hypnotic effects. Apoo can turn into instruments in seconds.