Nico Olvia was the mother of Nico Robin. And an archelolgist from Ohara who studied the Poneglyphs two decades ago.

While travelling around the ocean with a group of fellow archaelogists, Olvia was captured by the Marines for conducting forbidden research. She was able to return to Ohara and briefly reunite with her daughter with the help of Jaguar D. Saul, before perishing alongside the other Ohara archaeologists due to the Buster Call.

Nico Olvia resembled her daughter (before timeskip appearance) in many ways: they shared almost identical facial and physical features, and had identically shaped and colored eyes (brown in the manga and blue in the anime). However, Olvia's hair was white instead of black. Her hair was also longer and slightly curly, and in the anime, she had a lighter skin tone.

When she departed from Ohara in order to find the Poneglyphs, she had shorter hair .She was the mother of Nico Robin

and was very fond of her daughter. However, her life's work called her away, forcing her to leave Robin behind.

She regretted never being there for Robin, but died proud of her for being an amazing, smart child, who could even decipher Poneglyphs.