Marina

Claudine Barretto as Marina / Cristina

Agot Isidro as Sheila Corrales / Dugyot
Marina's best friend and the daughter of Dugong.

Bobby Andrews as Raphael Sandico

Thess Antonio as Azon

John Barretto as Leon del Rosario

Chokoleit as Pearly Shell

Sunshine Cruz as Istah

Maouie David as Quiana

Malou de Guzman as Dugong

Debraliz as Pilar Ballesteros

Deejay as Manding

Eugene Domingo as Lorelie

Gabb Drilon as Carlito Barbero

Alvin Fortuna as Randolph Rivera

Kristel Fulgar as Young Luna

Cherie Gil as Victoria Raymundo

Luke Jickain as Quintin Sandico

Jojit Lorenzo as Gaspar

Pauleen Luna as Isabel Ballesteros

Jenny Miller as Vyxia

Mura as Ninja
A creature with a turtle body and a green human head. Marina and him became friends when they met in the circus.

Jane Oineza as Young Marina

Dustin Reyes as Mario Ballesteros
The best friend of Esther and the only person who knows all the secrets of Esther and Marina.

Rafael Rosell as Rodge

Snooky Serna as Esther Sto. Domingo
The mother of Marina and the wife of Elias.

Meryll Soriano as Luna Raymundo

Robin Tolentino as Ronald Martinez

Joel Torre as Elias Sto. Domingo The Father of Marina and Luna,

Diether Ocampo as Prince Lirio