Books like One Piece, Volume 43: Legend of a Hero

Nico Robin gains hope once more and tells Luffy that she wants to live. Luffy and team take the mission of freeing her and fight with CP9 members. Again the are faced with unexpected powers and they show their amazing ability to learn from their opponent and take time to learn their weaknesses and defeat the CP9. Ussop plays an important rule of delivering the keys that will free Robin from her cuffs using his amazing shooting abilities to show that even if he doesn't have much strength in one to one compat he still a very important part of the team.