Eleanor is a formidable and mysterious figure, acting as both antagonist and complex love-interest in Dowd’s journey.
Ushio’s grandfather is the origin point of the family's mermaid vow, binding generations to a mystical past.
Joo Yoon-bal is the silent blade at Jin’s side, a protector with few words but fierce devotion.
Tiarozety Isol is a transmigrated reader who becomes the story’s protagonist after a twist of fate—armed with knowledge and sarcasm.