Mermaid Princess Amelia – Best Mermaid Book Series For Teenagers

Dominic Calidus is Samantha’s stepbrother, the son of King Amadeus and his second wife, Donna Calida. He and his full brother Dorian are repeatedly described as corrupt, thoroughly aligned with their mother’s faction, and willing to do whatever it takes to maintain power. They have been thrown into the pit for treason alongside Augustus and Silas, but while Augustus and Silas are rescued, Dominic and Dorian receive no sympathy. Amelia and Portia learn from a newspaper that the two brothers were also imprisoned, but they are left behind. Dominic has no direct dialogue or scene; he functions as a symbol of the rot within the Atlantean royal family—a corrupt stepbrother whose greed and ambition have made him an enemy not only of the protagonists but also of his own adopted siblings.