The son of Neptune and heir to the seven seas. He is rugged and tough. He has the appearance of a modern day biker but wields the power of his mighty Glave. His life beneath the sea is peaceful. The only thing he worries about is the well-being of his daughter Yara. Nautilus had relationships with a human woman and Yara was born. Yara uses it against him when he constantly preaches about the atrocities of humans. Against his better judgement, Nautilus eventually finds himself mixing it up in the fight against evil.