Bartholomew Kuma is a Shichibukai, formerly a Revolutionarywith a bounty of 296,000,000. He was once feared as an extremely vicious pirate, earning himself the title, "Tyrant". He is a type of cyborg called "Pacifista" developed by Dr. Vegapunk. Once Vegapunk finished his modifications on Kuma, the Shichibukai was converted into the first complete Pacifista cyborg, with the serial PX-0, and figuratively died in the process.