Robin is the most mysterious and most serious of the Straw Hats. I love her character because both Zoro and Robin have mutual feelings and get along well with each other. Like for the rest of the
crew, Zoro would risk his life to protect her too. Amongst the crew, Zoro and Robin are the most calm and serious in any situation. Robin is also the only person amongst the crew that never gets
on Zoro's nerves nor angers him over anything due to their similar personalities.
Nico Robin is the archaeologist of the Straw Hat Pirates. She was originally introduced as the Vice President of Baroque Works known as Miss All Sunday before joining up with the Straw Hats. She is the seventh member of the crew, the sixth to join, and, including Nami, also the second to rejoin, doing so near the end of the Enies Lobby Arc. She was also the first member to have been a former antagonist. She ate the Hana Hana no Mi. During the Post-War arc, she became involved with the Revolutionaries for two years. Her dream is to find the Rio Poneglyph which tells the True History.
Now wonder that she'd started using shades now, the purpose of that was to conceal which among her copies is the fake and the real one, since the fake has her eyes closed while the real one has her eyes open. Without the shades, it's pretty obvious who is the fake and the real one.