"Fena: Pirate Princess" is an animated series that follows the journey of a young girl named Fena Houtman. Orphaned and raised on a remote island, she discovers her true heritage and embarks on a quest to find a legendary treasure. Along the way, she is joined by a group of loyal pirates who help her navigate the dangers of the high seas. The show combines elements of adventure, fantasy, and action, featuring a diverse cast of characters, including Yukimaru, a skilled swordsman, and the crew of the ship, who face various challenges. The series is known for its stunning animation and engaging storytelling.