Fourteen-year-old Jean was just an ordinary would-be inventor, until the mysterious Nadia crashed into his life. With no family, a pet lion and a jewel known as the Blue Water, Nadia is constantly on the run from those who want to steal her most valuable gem. Now, with a trio of thieves and the nefarious organization known as Gargoyle on their trail, Jean and Nadia must struggle to learn the secret of the Blue Water and protect its powers from those who would use them to destroy the world!
Cheerful, optimistic Nadja is one of many English orphans living in the quaint Applefield Orphanage. Yet one fateful day, when the orphange is attacked by men looking for her mother's brooch, Nadja learns that her mother may still be alive after all. Hoping to protect the rest of the inhabitants of Applefield and to escape her would-be captors, Nadja runs away from the orphanage and joins the Dandelion Troupe -- a traveling band of circus performers. Filled with the greatest hope, Nadja's grand adventure begins in a search for her mother and her own identity...
In the anime Ashita No Nadja, Nadja, an orphan, joins a traveling street performance act called the Dandelion Troupe because she finds out her mother might be alive. She travels across Europe and finds many friends along the way that teach her things about herself. She also wears a brooch around her neck that a bunch of thieves are after.
In the anime Nadia: Secret Of Blue Water, Nadia, also an orphan, grew up in a circus. She travels across Africa trying to find out where she's from while all the while she is being hunted down for her jewel known as the Blue Water. Nadia also finds out her father might be alive.
You can see the similarities.
Both anime combine traveling to find out things about themselves, romance, and adventure.
So, I am almost positive if you like one, you'll like the other.
For centuries, a group of strange children with white hair have been appearing again and again, their origins and purposes unknown; yet always, it would seem, they are searching for something or someone. Now, in the year 2012, they have come to the South Seas to search. There, they encounter the young martial artist Tohma, who has been helping two runaway children from a nearby orphanage, Helga and Chitto. As Tohma learns more about the mysterious children, he also discovers a startling truth about his new friend Helga. A story unfolds that goes back centuries and across the stars, and will change everything in Tohma's and Helga's lives.
In the distant future, spaceships (known as whales) are not demolished, they are abandoned amongst the stars and salvaged by "whale hunters". For young Lucky Luck, finding one of the most famous whale hunters named Ahab could be the hey to saving a planet from destruction, but at what cost? Now, Ahab, a mysterious android named Dew and the rest of the gang must set out to find and defeat the white whale, before a countless number of lives is lost...
Edward Falcon is a would-be fighting champ with a father who left long ago to search for the mysterious and powerful Power Stones. After receiving what his father calls a precious stone, Edward finds himself constantly harassed by ninjas, samurai and others wanting to get their hands on it - even though he doesn't know what it is! Edward soon discovers that he's been entrusted with none other than a Power Stone, and from henceforth he tries his best to keep it safe, while also uncovering its secrets and trying to track down his father.
Nadia and Power Stone are both adventurous tales with comedic elements and slapstick villains. Both are fairly terrible in some ways, but Power Stone takes the case for awfulness. Regardless, as they're aimed at the same age level and have a very similar feel, fans of one might enjoy the other.
Having lost her mother at birth, Jane Buxton grows up with her brother George the dreamer and her moody step-brother William. George sets off to seek a legendary 'floating liquid' that he hopes can revolutionize transportation and bring about human flight, but word soon returns of his tragic death. Convinced that her brother is still alive, Jane courageously sets off to find him, and encounters a world of adventure.
Nadia and Secret of Cerulean Sand, are both family friendly adventures set in the past.
They also both have a set of young main protagonists, that are part of a larger team set up on a mission.
The similar themes do not stop there. The two shows have amazing machines that stretch the possibility of inventions far beyond thier years, but use materials that would have been readily available. Wood/Rivets/steam engines.