Nico Robin (hereinafter referred to as Robin) was born in O 'Hara Island in the West Sea, and his parents were scholars in O 'Hara Island. She was born without a father, and when she was 3 years old, her mother went to sea to do research. Robin has been alone since childhood. Although I was taken in by my uncle, I still have the same status as a servant. Because she is the fruit of the devil, other children on the island regard her as a monster and crowd her out. The only person who can be called her friend is a scholar who works in the tree of omniscience. Robin is a gifted archaeologist. At the age of eight, he got full marks in the doctoral examination and became a member of O 'Hara scholars. It was also when she was 8 years old that the world government found evidence of the taboo history "blank century" in O 'Hara Island, so it launched a massacre order to destroy the whole island. Robin escaped from O 'Hara. After O 'Hara was destroyed, Robin became the only person in the world who could read ancient Chinese characters, so he was awarded 79 million Vamberley by the world government. In order to survive and inherit the legacy of his mother and O 'Hara scholars, 8-year-old Robin can only betray his partner constantly to avoid the pursuit of the navy and bounty hunters. After the Alabama incident, Robin joined Luffy. Unlike those who just want to use her before, Luffy and others regard her as a real partner.

In the capital of seven waters, Robin met CP9 (the spy organization of the world government). CP9 threatened to use the demon slaying order against the straw hat pirates if she didn't cooperate with them. This time, she can't continue to betray her partner. In order to save Luffy, she sacrificed herself and let CP9 take herself to the Judicial Island. However, when Luffy and his party broke through the tight encirclement and went to Justice Island to save her, she suddenly remembered what Sharon had said to her: "One day, you will definitely find a partner who is willing to sacrifice everything for you."

After everyone's efforts, Robin was finally saved. Now she doesn't have to worry about anything, because she finally has a group of real partners.