Kanata Shinkai is a whimsical, water-bound soul with a serene yet unpredictable nature, intrinsically tied to the sea’s rhythms. Born into a religious cult that worshipped him as a divine entity, he was molded to serve others’ desires, convinced this self-sacrifice shielded the world from calamity. This upbringing stifled his emotional expression and warped his grasp of human bonds, until childhood companion Madara Mikejima and steadfast ally Chiaki Morisawa disrupted his isolated worldview. A turning point emerged when Kanata’s inability to heal Madara’s sister fractured their bond, amplified by the cult’s deceit in framing Madara as a betrayer. At Yumenosaki Academy, Kanata joined the revered “Five Eccentrics,” idolized yet envied for their unrivaled influence. Their reign crumbled under student council leader Eichi Tenshouin’s schemes, culminating in Kanata’s public defeat during a festival. Stripped of his divine aura, he confronted human fragility, sparking introspection. Chiaki’s refusal to idolize him—choosing partnership over reverence—anchored Kanata’s growth. Together, they rebirthed RYUSEITAI, where Kanata embraced the mantle of Ryusei Blue, embodying ocean enigmas and celestial tides. Kanata navigates life with childlike wonder and quiet contemplation, framing affection through aquatic metaphors—comparing bonds to coral symbiosis or tides’ constancy. Though water sustains him, prolonged dryness causes physical distress, driving his ritual “puka puka” sessions of floating bliss. Paradoxically, he curates an aquarium as its mascot Kanatee, championing marine preservation despite being unable to swim. Guiding juniors like Midori Takamine, he dispenses quirky wisdom, likening resilience to seahorses adapting to currents. His evolution hinges on shedding the deity identity forced upon him. Slowly, he voices personal yearnings and embraces emotions, channeling self-sacrifice into uplifting others as RYUSEITAI’s “hero.” Quirks surface in impulsive souvenir purchases, crafting seashell trinkets, or dousing meals in soy sauce. His speech, a cascade of hiragana, mirrors unfiltered simplicity, while hidden strength lets him haul massive fish tanks with ease. Kanata’s journey mirrors oceanic evolution—a creature of depth learning to navigate both water and air, forever redefining purpose beyond the roles others carved for him.