Julian Solo is the human incarnation of Poseidon, the god of the sea, in the anime series Saint Seiya. He is a wealthy and influential young man who becomes the host for Poseidon during the Poseidon arc. As Kaiou Poseidon, he seeks to flood the Earth and cleanse humanity, acting as the main antagonist. Despite his antagonistic actions, Julian struggles with the conflict between his own will and Poseidon's divine influence, adding depth to his character.