Nadia la Arwall is the protagonist of the anime series 'Fushigi no Umi no Nadia' (Nadia: The Secret of Blue Water). She is a spirited and independent young girl with mysterious origins, who possesses a blue pendant that holds powerful secrets. Nadia dreams of returning to her homeland, Atlantis, and is determined to protect her pendant from those who seek its power for evil purposes. Throughout the series, she embarks on a journey across the world with her companion Jean, learning about friendship, trust, and her own identity while thwarting the villainous plans of Gargoyle and the Neo-Atlantean forces.