1-The surname “Nefeltari” is ancient Egyptian and means “the most beautiful” or “most wonderful.” It was a word often used to describe Egyptian queens and princesses. Vivi may be named for Nefertari Meritmut, the wife of famed pharaoh Ramesses the Great. Oda admitted the Alabasta Arc was based around ancient Egypt.
2-Vivi has her own personal Jolly Roger. This was first seen on the hat she was wearing in Igaram’s nightmare when he feared that Vivi would run off to become a pirate with the Straw Hats.
3-Despite her long absence from the series and her separation from ties to the Straw Hat crew, Vivi and Carue have been featured on the cover pages of several chapters. On the cover of Chapter 640, Vivi was shown after the time-skip. She now wears her hair down but held back by a clip, and it seems a bit shorter than before. Like most female characters since the timeskip, her hourglass figure has become more pronounced.
4-In the manga, when Vivi is still a member of Baroque Works, her top is different than that of the anime. The reason why the anime changed it is unknown, but it is most probably because of how the circles on her chest resemble nipples.
5-In chapter 908 we see Im heads out, leaving behind the torn-up bounty posters of Luffy and Blackbeard as well as a picture of Shirahoshi with a sword plunged into it. Carrying a picture of Vivi, Im heads to the Empty Throne, which this individual sits on. The Five Elders kneel before Im, requesting that the figure share with them the name of the “light” that needs to be extinguished from history.
6-Vivi is similar to Rebecca as they are both princesses who became acquainted with Luffy and his crew, who in turn saved their country from a Shichibukai.
7-Vivi traveled with and assisted the Straw Hhat Pirates for almost the entire Alabasta Saga and strongly considered joining their crew after Crocodile’s defeat. Though she ultimately declined their offer in favor of working to restore her country, she remains closer to the Straw Hats than anyone else outside of their crew. She and Carue are now regarded as honorary members of the Straw Hat Pirates.
8-As of the 6th Japanese Fan Poll, Vivi is the 23th most popular character, making her the fifth most popular female of the series behind Perona, Nico Robin, Boa Hancock, and Nami.