In Ancient Greek mythology, Poseidon is the god of the sea, storms and earthquakes. His Roman equivalent is Neptune. In Greek mythology, he is the brother of Zeus and Hades, the gods of the sky and underworld respectively. he has a serious tone and very intimidating, but can't stand his creatures in the sea getting hurt by humans. he is very powerful amongst the other gods, he is hardworking and often starts storms and earthquakes to make the humans leave the oceans, immediately.