Poseidon Atlantis is a prominent character in the anime and manga series Shuumatsu no Valkyrie (Record of Ragnarok). Known as the God of the Seas, he represents the Greek pantheon in the gods-versus-humans tournament. Cold, ruthless, and possessing an overwhelming sense of superiority, Poseidon faces off against humanity’s greatest champions with immense power and skill. His role in the series is that of a formidable antagonist, embodying divine arrogance and the unyielding strength of the gods.