(Ushio’s grandfather)

Ushio’s grandfather is the origin point of the family's mermaid vow, binding generations to a mystical past.

His voice echoes from the past. 'A promise once made beneath the waves... must never be broken.'

Ushio’s grandfather is the origin point of the family's mermaid vow, binding generations to a mystical past.

Eleanor Tristan (Eleanora Elinariz la Tristan)

Eleanor is a formidable and mysterious figure, acting as both antagonist and complex love-interest in Dowd’s journey.
Riru / Faenol

Riru, also known as Faenol, is a late-game heroine with ties to deeper truths and dark powers, balancing mystery and warmth.
Tiarozety (Tiarosetti) Isol

Tiarozety Isol is a transmigrated reader who becomes the story’s protagonist after a twist of fate—armed with knowledge and sarcasm.
Eleonora

Eleonora is a mysterious corpse knight of immense power, caught between duty, survival, and the secrets of her resurrection.