TV-Series
Description
In Ulysses 31, Poseidon is the ancient Greek god of the seas, reimagined as one of the Olympian deities who rule the universe in the 31st century. He is defined above all by his connection to the Cyclops, a giant creature described as his own. When the hero Ulysses destroys the Cyclops to rescue his son Telemachus and the other captive children, Poseidon is enraged, and this act of defiance against a divine creation is what sets the entire series in motion. Alongside Zeus and the other gods of Olympus, Poseidon takes part in the punishment of Ulysses, and the gods transport the Odyssey into an unknown region of space, placing most of the crew under a curse that leaves them frozen in suspended animation until Ulysses can find the Kingdom of Hades.

As a personality, Poseidon is portrayed as a proud and vengeful deity whose anger has a personal dimension. The loss of the Cyclops, his creature, gives him a direct stake in the conflict, and he stands among the divine forces who actively oppose Ulysses throughout his voyage. He embodies the arrogance and unforgiving nature of the Olympian gods, who see the destruction of their servant as an offence that must be answered with an eternal ordeal. He does not soften or change over the course of the story; he remains a persistent representative of the divine order that Ulysses has challenged.

In terms of his role in the story, Poseidon is one of the recurring antagonists. His presence is felt chiefly through his servants, who pilot warships shaped like a trident, the symbol of his power. These trident-shaped vessels attack the Odyssey at several points during Ulysses's journey, making Poseidon a continuing threat even when he does not appear directly. He also functions as one of the gods who reinforce the larger sentence imposed by Zeus, reminding the audience that the hero is hunted not by a single deity but by the whole of Olympus.

His key relationships are with the other gods, particularly Zeus, with whom he shares the role of persecutor of Ulysses, and with the Cyclops, his slain creature, whose destruction fuels his desire for revenge. His relationship with Ulysses is one of direct opposition, as the captain's deed has made him an enemy of the sea god. His servants, the crews of the trident ships, act as extensions of his will and carry out his hostility across the cosmos.

His notable abilities include the wielding of the trident, described as the symbol of his power, and command over subordinate forces such as the Cyclops and the pilots of his trident-shaped warships. As one of the gods of Olympus, he belongs to the divine hierarchy that controls the universe through which Ulysses travels and can take part in the supernatural punishment of mortals.

In terms of development, Poseidon is a largely static character. The series does not show him undergoing personal change or growth; instead, he remains an implacable divine adversary whose anger, established at the very beginning, continues to shape the obstacles Ulysses faces until the final confrontation at the Kingdom of Hades, where the gods' hold over the hero is ultimately tested and broken.