Nadia is a 14 year-old Kenyan circus performer. She is stubborn, short tempered and a strict vegetarian. After Jean rescues her from the Grandis Gang, she sets out on an adventure with him to determine the origin of the "Blue Water", the jewel that beckons the criminals to her. Always accompanied by her tamed lion cub, King, she sometimes mistreats people, but as she grows closer to Jean she learns to become a much more caring and trusting person.

Nadia: The Secret of Blue Water (ふしぎの海のナディア Fushigi no Umi no Nadia, lit. "Nadia of the Mysterious Seas") is a Japanese animated television series inspired by the works of Jules Verne, particularly Twenty Thousand Leagues Under the Sea and the exploits of Captain Nemo. The series was created by NHK, Toho and Korad, from a concept of Hayao Miyazaki, and directed by Hideaki Anno of Gainax.