Monkey D. Luffy is the protagonist of One Piece and one of the strongest pirates in the history of the Grand Line. He aims to conquer the Grand Line, find Gol D. Roger's legendary treasure , and become the King of the Pirates, but in order to do so, the Straw Hat Pirate will need to grow become powerful enough to defeat any opponent that stands in his way.
Source：https://www.cbr.com/one-piece-luffy-forms-ranked/
