Biography
The main protagonist of the series. Nadia is a 14-year-old (15 toward the end of the series) who works in a circus as an acrobat in order to survive, since she is an orphan and of unknown origins. She is chased by Grandis and her associates Sanson and Hanson, who are looking for the jewel that Nadia possesses, the Blue Water. While escaping from them, she meets Jean, and from that moment the two of them will be together in the series, where she tries to discover her origins and find out the truth about her past and the Blue Water, the jewel that seems to have an enormous intrinsic power.
Nadia is quite stubborn, easily irritable, socially inept, and has the ability to talk with animals. For example, she is able to communicate easily with her pet lion cub, King. Nadia is also known among those who have knowledge of the Blue Water for being its possessor. Despite her flaws, Nadia is highly moralistic and ethical, frequently calling others out on acts of violence towards other humans or animals, even when it is essential. She even happens to be a strict vegetarian and believes that there is no excuse for eating meat or killing (although her friends attempt to justify their reasons for doing so). Because of her unhappy past, Nadia is even extremely suspicious of all grown-ups—particularly Nemo. As such, she does not know how to act around other people, and sometimes treats them very badly. She misjudges her friends' motivations as well. As a result of her growing love for Jean, however, she comes to learn valuable lessons about friendship, respect, and trust for those around her. On several occasions she is prepared to sacrifice either her life or her freedom to protect her friends.
It turns out the Nadia is the rightful heir to the throne of Atlantis, and that her Blue Water has the power to destroy the world, if it is misused. Ashamed of her fate and regretting both her resentment of Nemo and bad calls of judgment, Nadia impulsively decides to throw her life away... only to be spared by the power of the Blue Water. Jean touches Nadia's heart by telling her that he loves her regardless of who she is, where she is from, and her fate. Inspired, Nadia decides to embrace her fate and is rewarded when she discovers that she can choose how to use the Blue Water's power.
In the epilogue told by a grown-up Marie in the last episode, Nadia has married Jean and they have a child. While Nadia is still a dedicated vegetarian, she is no more aggressively so (as evidenced from her meals of meat and fish for Jean and their son).