Hanson Friends

A scientific officer aboard US warship Abraham; he claims to be an English nobleman who's going to inherit a large wealth from his family.

The leader of the Nautilus, he and his crew battle against the Neo-Atlanteans. He is secretly Nadia's father.

Eiko is Nautilus' sonar operator and founder of Ikolina's fan club. Before being a sonar operator Eiko was the sole survivor of the shipwreck of Elise Le Havre, Jean's father's ship.

Electra is an orphan since the destruction of her hometown, after which she is saved by captain Nemo and she is the First Officer of the 'Nautilus', fighting Gargoyle and the Neo-Atlanteans. Electra is deeply in love with Nemo, although she also burgeons a deep grudge from the destruction.

Grandis Granva is the head of the Grandis Gang, a trio of jewel thieves. Once a wealthy Italian noblewoman, she lost her fortune to a deceitful womanizer. She met Nadia while in pursuit of her jeweled necklace, the Blue Water. Later, they became friends.

The second main protagonist of Nadia - Secret of Blue Water, Jean is a 14 year-old orphan from France who fell in love with Nadia at first sight.

Marie is a 4 year child orphaned by the hands of Gargoyle and the Neo-Atlanteans, who killed her parents. She is soon found by Nadia and Jean, who decide to keep her and to take good care of her.

Sanson is Grandis henchman/friend and happens to be the strong man, sharp-shooter, and driver of the Grandis Gang.