Greek god of the Sea, father and former master of Ed K. Danvers. Poseidon is a jealous god, possessive and acquisitive. His plan to own the city of Saskatoon and it's environment for himself was thwarted by his son and former Hand rebelled successfully.
As a god, Poseidon is a Plot-Device Level character, and wise PCs won't directly oppose him.
For more information, consult the wealth of mythological works on the subject.