Monkey D. Luffy is the main protagonist of the anime and manga series One Piece. He is the captain of the Straw Hat Pirates and aspires to become the King of the Pirates by finding the legendary One Piece treasure. Luffy is known for his carefree and adventurous spirit, as well as his strong sense of justice and loyalty to his friends. He possesses the power of the Gum-Gum Fruit, which grants him rubber-like abilities, allowing him to stretch his body in extraordinary ways.