Elva of the Seas

Elva grew up adored and coveted, set to inherit a kingdom, but now that her sister has become queen, shadows are the only things Elva has left to rule. A cruise is meant to help her get away from it all, and she knows no one will miss her. Once on the sea, she's kidnapped by a far too handsome pirate. He promises rewards if she helps free his uncle, and all he needs is her ability to communicate with sea serpents. All she needs is the chance to prove the might of a princess.