Granmamare reigns as the Goddess of Mercy and queen of the sea, a powerful yet benevolent oceanic deity. She commands marine life and upholds natural balance, revered by sailors as a guardian figure linked to fortune and compassion, echoing figures like Kannon or Guanyin in Buddhist tradition. Her origins are purely divine, with no human past, existing as a fundamental force within the ocean's ecosystem. Manifesting as an ethereal woman, she possesses exceptionally long, flowing pinkish-red hair, golden-brown eyes, purple eyeshadow, and red lipstick. She wears a pale blue billowing dress that adapts to her surroundings—lengthening underwater and shortening to floor-length on land. Her adornments include a ruby magenta necklace with gold spacers, a matching circlet centered by a red glass bead, three-drop sea glass earrings, and golden bangles on her right arm. Granmamare can dramatically alter her size, shifting from a colossal form larger than a blue whale to a human-scale figure, consistently retaining her features and luminous presence. Granmamare intervenes at critical moments to restore equilibrium. She revitalizes stranded ships, reigniting engines and aiding sailors. When Ponyo's magic threatens balance, she proposes a test for Sōsuke: his unconditional love for Ponyo, regardless of her form, would restore nature and allow Ponyo to remain human. Failure would turn Ponyo to sea foam. Granmamare oversees this pact, instructing Sōsuke to kiss Ponyo to complete her transformation once mutual commitment is confirmed. She facilitates communication between realms, conversing with Lisa about the children's challenges and granting humans temporary underwater breathing during the flood. Her powers encompass mind-reading through touch and environmental restoration without ecological disruption. Her personality radiates calm wisdom, profound empathy, and patient understanding. She approaches conflicts with serenity, soothing Fujimoto's anxieties and respecting Ponyo's autonomy despite risks. She demonstrates deep affection for all her daughters, collecting and kissing them tenderly, and willingly entrusts Ponyo's care to Lisa and Sōsuke for her happiness. Though likely to miss Ponyo, she prioritizes her daughter's fulfillment over personal attachment. As Ponyo's mother, she supports her daughter's desire to become human, requiring Ponyo to relinquish her magical abilities for a permanent transformation. She is equally nurturing toward Ponyo's numerous younger sisters. As Fujimoto's wife, she interacts with patience and kindness, countering his anxiety without reproach despite his expectations of criticism. Their relationship balances a stressed, earthbound wizard husband and a transcendent, oceanic goddess. Her mythological ties evoke mercy and oceanic guardianship, distinct from yet occasionally conflated with figures like Ryujin or Susanowo from Japanese folklore.