Caesar Clown

Caesar Clown is a former World Government scientist turned pirate. Reasearching weapons in a Punk Hazard laboratory, he developed a gas called the Land of Death. He worked with Donquixote Doflamingo to develop a substance called SAD to make artifical Devil Fruits. He attempted to experiment on the Straw Hat Pirates and the G-5 Marines. Fortunately, Trafalgar Law destroyed the SAD production room and Luffy was able to defeat Caesar Clown. He is taken as a hostage afterwards.

Role in Games
In One Piece: Pirate Warriors 3, Caesar Clown was taken to be handed over Doflamingo who had apparently quit the Seven Warlords of the Sea. unfortunately, it was all a ruse, and the Straw Hat crew had to take him back to their ship under watch.

Personality
Caesar Clown is normally kind to his subordinates who address him as "Master", but underneath, Caesar is insane and will not hesitate to sacrifice his pawns.

Fighting Style
Caesar Clown has the ability to control and poison the air around himself and turn into gas. He produce toxic and combustible gas as well.