She is fundamentally a peace-loving and kind-hearted young lady who puts the pain of others before her own. However, above all, she possesses a strong sense of responsibility as a member of the royal family leading a nation. Despite her status as a princess, she shows no arrogance in seeking only her rights. Instead, she practices noblesse oblige by faithfully fulfilling her duties for the country and its people, while also interacting freely and without pretension with the common citizens. Consequently, all the citizens of Alabasta who know Vivi sincerely respect and follow her. Even Cobra, who is evaluated as one of the greatest monarchs in the One Piece world, feels proud watching Vivi grow into a fine leader. Unlike the stereotypical image of a princess who exudes a refined and elegant atmosphere, she is quite bold and strong-willed. Driven by curiosity and a strong sense of action, she often appears more like a headstrong tomboy than a noble and graceful princess. She possesses a mature and resilient personality with immense mental strength. She felt deep gratitude toward Guest, the temporary royal guard who protected her to the end and helped save her kingdom alongside the Straw Hat Pirates. The romantic feelings that blossomed between them led to an official marriage a few months after the Straw Hat Pirates left Alabasta, once her father, Nefertari Cobra, accepted Guest as his son-in-law. Since then, she has been a devoted wife to Guest, becoming an affectionate and lovely spouse when they are alone. Notably, while they do not yet have children to carry on the Alabasta royal line, their marital harmony is so exceptional that not a single scandal has surfaced even after two years.