Luca

Luca Paguro is a curious and adventurous young sea monster who desires to explore the world above the sea. Despite his overprotective upbringing, he dares to challenge the boundaries set by his parents. His journey of self-discovery shapes him into a courageous character who ultimately embraces his true nature.

Alberto is a spirited sea monster who introduces Luca to the joys and wonders of life on land. His adventurous spirit is coupled with a sense of loneliness, stemming from his father's absence. Throughout the movie, he navigates feelings of jealousy but ultimately desires a true friendship with Luca.

Giulia is a confident and determined girl who thrives during her summers in Portorosso. She supports both Luca and Alberto, welcoming them into her adventures. Her skill and leadership in the Portorosso Cup Race highlight her fearless nature and the importance of friendship in overcoming challenges.

Daniela is Luca's protective mother, embodying the traditional fears of the unknown world above the water. Her deep love for Luca drives her to keep him safe, reflecting the maternal instinct to shield loved ones from danger. Her growth in understanding Luca's desires marks an important arc in the film.

Lorenzo is Luca's father, who, like Daniela, is concerned for his son’s safety. His character highlights the theme of parental protection and the struggle between fear and understanding as he learns to trust Luca's growing independence. His journey reflects the balance of love and letting go.