Back in the Enies Lobby arc of One Piece, as a way to try and reassure Usopp, Sanji said a memorable quote: "I'll do what you can't do, and you do what I can't do." This essentially sums up how the Straw Hats, despite all having their own personal weaknesses, are able to make up for one another by filling in these gaps, ensuring they are always a strong and reliable crew who can take down anything the Marines throw at them.