Topic summary
Straw Hat Pirates
Extracted from the Wikipedia article Straw Hats.
Nico Robin
After Baroque Works falls apart, with nowhere else to go, she tags along with the Straw Hat Pirates and grows so fond of them that she gives herself up to the Government to save them. After they discover her real reason for leaving, the Straw Hat Pirates declare open war against the Government to get her back. She realizes that she has finally found people who will never betray her and officially joins the crew. During the two-year timeskip, Robin further hones her Devil Fruit powers with the Revolutionary Army to the point where she can create a full-bodied duplicate of herself.