Monkey D. Luffy, also known as ” Straw Hat Luffy” and commonly as “Straw Hat”, is the main protagonist of the manga and anime, encanto costume One Piece. Monkey D. Luffy is the main protagonist of the popular manga-turned-anime, One Piece. Treasure yourself dressed up in a Luffy costume, some straw sandals, a straw hat, and a black hair wig. The Luffy cosplay will be a sure win!