Movie
Description
Oceanus, called Glaucos in the original Japanese version of the film, is the God of Water and the ruler of the sea in the anime The Sea Prince and the Fire Child. The English adaptation of the film renamed him Oceanus, just as the goddess of fire Themis was renamed Hyperia. He belongs to an elder generation of elemental deities, and his ancient history with the fire clan shapes the entire world of the story.

In the beginning, Oceanus and the goddess of fire were brother and sister who lived in harmony and loved one another deeply. The wind god Argon, jealous of their happiness, whispered lies to each of them, convincing both that the other was plotting against them. The deception succeeded, and the two siblings turned against each other with such fury that the children of water and the children of fire were drawn into a devastating war that nearly destroyed both clans. When the supreme god who rules the universe intervened, he tore out Argon's eye, the source of the wind god's power, and imprisoned Argon in the deepest abyss of the oceans. The eye was entrusted to Oceanus as a means of keeping the seas calm. The goddess of fire, for her part, created the Holy Flame at the edge of the sea so that her own children would never be extinguished. From that time on, the brother and sister were forced to remain apart, Oceanus ruling from his water castle in the sea and the fire goddess ruling from her palace of flame on land, with their peoples forbidden from ever meeting.

In terms of personality, Oceanus is initially defined by warmth and trust; he loved his sister sincerely, and it is precisely this trusting nature that Argon exploits. After the betrayal, that intensity turns to bitterness, and he carries a lasting resentment toward the fire clan that he passes on to his subjects. He comes across as a solemn, commanding figure who takes his duty as guardian of the seas seriously. His motivations center on protecting his kingdom and his people. He treats the Eye of Argon as a sacred responsibility meant to keep the waters peaceful, and he regards the separation between water and fire as necessary for survival. This makes him both a protector of his own realm and an obstacle to any connection between the two clans.

In the story, Oceanus serves as the elder authority whose past actions created the central conflict. Years after the war, he entrusts the Eye of Argon to his most loyal warrior, Sirius, whom he also designates as heir to the Sea Kingdom and the first king of the water clan. When Sirius falls in love with Malta, the daughter of the fire goddess, and their secret meetings are discovered, Oceanus is among the rulers who have the young lovers captured, standing in direct opposition to a romance that defies the old hatred. His decisions therefore bracket the narrative: his broken relationship with fire created the world the younger characters inherit, while his later judgment forces them to choose between obedience and love.

His most significant relationship is with the fire goddess, his estranged sister; the love turned to enmity between them is the model for everything that follows. With Argon he shares a history of betrayal, and as the keeper of Argon's eye he holds the symbol of the wind god's defeat. With Sirius he acts as a mentor and sovereign, having raised the young warrior in his service and passed on both power and responsibility, even though Sirius's choices ultimately go against the old order. Oceanus does not undergo a major personal transformation over the course of the film; his change happened long before the story begins. What the audience sees is a ruler who has hardened after his loss, and who eventually steps aside in favor of the next generation.

As for abilities, Oceanus is a divine being of considerable power. He appears in the form of a giant dragon and governs the seas from his water castle. He possesses authority over the oceans and, as the holder of the Eye of Argon, carries a force strong enough to keep the entire sea calm, making him one of the most powerful figures in the world of the story.