Prince Fjord, the human prince central to the narrative through his encounter with Marina, possesses military training and demonstrates notable bravery—exemplified when rescuing Marina from wolves during a horseback excursion. He exhibits a fierce aversion to arranged marriage, driven by an unwavering desire to wed the unknown woman who saved him after a shipwreck. This singular focus defines his character. Mistakenly believing foreign princess Cecilia of Suomi rescued him—as she was the first person he saw upon awakening on the beach—Fjord agrees to marry her. This decision fulfills his parents' wishes while aligning with his conviction that he found his savior. During Marina's month-long stay after he discovers her mute on the shore—dubbing her "Princess Mermaid"—they forge a close bond. Fjord confides in Marina his intent to reject the arranged marriage for her sake, revealing genuine affection. His failure to recognize her as his true rescuer precipitates the tragedy. After Marina plunges into the sea and dissolves into foam at sunrise, Fjord discovers her pearl hairpin and a tail scale on the deck. This triggers his realization that she saved him. His grief over this loss concludes his arc, marked by misplaced recognition and irreversible consequences.