About Bartholomew Kuma
Bartholomew Kuma is a former Warlord of the Sea, the former king of the Sorbet Kingdom, and most notably an officer, as well as founding member of the Revolutionary Army with a bounty of 296,000,000. He is also the adoptive father of Jewelry Bonney, daughter of his late friend and fellow revolutionary Ginny. Kuma is a member of the near-extinct special race known as the Buccaneers, inherited from his late father Clapp.
As a pirate, Kuma sailed the seas as a single-person pirate crew. Because of the lies told to the public by the World Government, Kuma became feared for being extremely vicious, earning himself the title "Tyrant". In exchange for curing Bonney of the deadly Sapphire Scales disease, Kuma became a special type of cyborg known as a "Pacifista", developed by the world renowned scientist Vegapunk. Once Vegapunk finished his modifications on Kuma, the Warlord was converted into the first complete Pacifista cyborg, with the serial PX-0, and mentally died in the process. Vegapunk also cloned Kuma as S-Bear, one of the Seraphim that were designed to replace the Warlords.
Kuma has been enslaved by the World Nobles twice in his lifetime: The first time was in his infancy until he escaped during the God Valley Incident and the second time in adulthood as punishment for the two years he spent protecting the Thousand Sunny, which lasted until his fellow revolutionaries freed him during the most recent Levely.
While Kuma was presented as a major antagonist during the Thriller Bark and Sabaody Archipelago Arc, he was secretly an ally. His action of separating the Straw Hat Pirates was ultimately done in their best interest, as it saved them from Admiral Kizaru and helped the crew's captain Monkey D. Luffy realize that his crew was too weak to survive in the New World and needed to train first; thus, Kuma played a key role in the subsequent timeskip. In his mindless state, Kuma is a major antagonist in the Marineford Arc where he took part in the Summit War of Marineford and sided with the Marines, along with most of the other Warlords, but he later becomes a major ally during the Egghead Arc and an important figure behind its ongoings.