Trafalgar D. Water Law
Trafalgar D. Water Law (トラファルガー・ロー) is a former Shichibukai and the current leader of the Heart Pirates as well as a member of The Worst Generation. He is a captain part of the Ninja-Pirate-Mink-Samurai Alliance, and he plans to take down Kaido with this alliance. He is the current user of the Ope-Ope no Mi (called the Op-Op Fruit in English releases), a powerful fruit that complements his strengths as the "Surgeon of Death".
Law was born in the "White City" of Flevance, a city located in East Blue. Flevance was the site of a major tragedy caused by its major resource, Amber Lead. Unbeknowngst to the miners in the town, this white ore causes a serious illness, one that caused Law to have to flee from the city. His entire family dead, Law was now alone.
Law eventually met Donquixote Doflamingo, the captain of the Donquixote Pirates. Being only a child, Law knew he needed to prove his determination and strength to be able to join the crew, so he covered himself in bombs in order to prove himself.