The Witch, a shrewd and enigmatic entity in the anime adaptation, lurks within the ocean’s treacherous depths, her colossal devil ray form mirroring the sea’s shadowy mysteries. Neither malevolent nor benevolent, she operates with pragmatic detachment, trading in bargains steeped in irreversible cost. Her power manifests in tempests that drag ships to the abyss, showcasing dominion over nature’s fury. When the mermaid protagonist seeks humanity, the Witch demands her voice—extracting the tongue as payment—and crafts a potion that severs aquatic ties, forewarning of agonizing legs that cut like blades. Her warnings linger: identity lost, pain eternal. Motivations shrouded in ambiguity, she adheres strictly to transactional neutrality, neither aiding nor hindering beyond agreed terms. After the transformation, she recedes into obscurity until the mermaid’s desperate sisters barter their hair for a dagger—a final gamble to reverse fate. The blade offers salvation through the prince’s blood, yet the Witch remains indifferent to its use, bound by her realm’s unyielding laws. Her role embodies sacrifice and consequence, a neutral arbiter weaving destinies through cold exchange. She is the sea’s untamed will—unmoved by mercy or malice, enforcing equilibrium where magic and mortality collide.