Nadia la Arwall

Nadia is a fourteen-year-old orphan who wears a mysterious pendant around her neck. Aside from this, she is unaware of her origins, although she suspects she might be from Africa. Having grown up in a circus under the unloving care of her ringmaster, Nadia has developed a vicious animosity toward grown-ups. She also opposes killing of any kind--in fact she angrily refuses to show Nemo any gratitude when he guns down a Neo-Atlantean to save her from being shot, accusing him of "murdering in cold blood." In addition, she is a strict vegetarian, declaring that humans have no right to feed off animals, while turning a deaf ear to her friends' suggestions that they eat meat out of hunger.

Stubborn and bad-tempered though she is, Nadia is actually very insecure and fears that everyone will betray her. As a result of her growing love for Jean, however, she learns valuable lessons about respect, love, friendship, and faith.

In the epilogue told by a grown-up Marie in the last episode, Nadia has married Jean and they have a child.