An unnamed girl was speculated to be a descendant of the last Barracuda royal family in The New Princess. It was said that the Barracuda Princess fell in love with a Drylander and left Salacia, which was why the Barracuda royal family disappeared.
Tubarina, Ester and Polvina notice the barracuda being happy around a Drylander girl, which was a strange sight to them considering that barracuda are usually grumpy. They report this sight to the Shark King and Queen, who laugh it off before speculating if the legend was true about the Barracuda Princess falling in love with a Drylander.
The three princesses manage to track down the girl the next day and follow her to an island where she and her mother are working as scientists. With Polvina bringing her book on the ancient Barracuda Kingdom, they leave a message in the sand as a test to see if they are related to the Barracuda royal family - "Hello" in the ancient Barracuda language. The girl and her mother recognise the writing in the sand as the same writing that was on a golden bracelet from the ancient Barracuda kingdom. The three princesses manage to escape before they are found, with Polvina discovering that she left the book on the island. They speculate if the golden bracelet was handed down through the girl's family or if she "just found it in the sea".
The next day, the three princesses return to the island, but they discover that the girl and her mother have left the island, with Polvina's book on a rock. They discover that she may know about the princesses' existence as she left a message in the sand - "Goodbye, friends" in the ancient Barracuda language. This leaves the princesses' mystery as to whether the girl is a descendant of the Barracuda royal family unsolved.