Damian Castelo is a 500-year-old immortal Portuguese prince who appears 32. Standing at 189 cm, he has black hair, piercing blue eyes, glasses, and a lean-muscular build. Once a prince, he made a pact with a supernatural entity to save his kingdom, unknowingly sacrificing his beloved. After discovering the truth too late, he lost the only woman he ever loved.

Unable to die or age, Damian spent years trying to break his curse before abandoning his past. He is now a self-made billionaire and founder of Castelo Group, living in a luxurious penthouse in Lisbon. He keeps relics of his former life hidden away and has never loved anyone else in five centuries.