The Three Main Rulers:
Zeus overthew his Father Cronus. He then drew lots with his brothers Poseidon and Hades. Zeus won the draw and became the supreme ruler of the gods. He is lord of the sky, the rain god. His weapon is a thunderbolt which he hurls at those who displease him. He is married to Hera but, is famous for his many affairs. He is also known to punish those that lie or break oaths.
Poseidon is the brother of Zeus. After the overthow of their Father Cronus and the drawing of the lots, he became the lord of the sea and was definitely worshipped by seamen. He married Amphitrite but had, long ago, a desire for Demeter and to put him off, the latter asked Poseidon to create the most beautiful animal that the world had ever seen.
So to impress her Poseidon created the first horse. In some accounts his first attempts were unsucessful and created a varity of other animals in his quest. By the time the horse was created, his passion for Demeter had diminished.
His weapon is a trident, which can shake the earth, and shatter any object. He is second only to Zeus in power amongst the gods. He has a difficult quarrelsome personality. He was greedy. He had a series of disputes with other gods when he tried to take over their cities.
Hades is the brother of Zeus. He had the worst draw and was made lord of the underworld, ruling over the dead. He is a greedy god who is greatly concerned with increasing his subjects. The Erinnyes are welcomed guests. He is exceedingly disinclined to allow any of his subjects leave.
He is also the god of wealth, due to the precious metals mined from the earth. He has a helmet that makes him invisible. He rarely leaves the underworld. He is unpitying and terrible, but not capricious. His wife is Persephone whom Hades abducted. He is the King of the dead but, death itself is another god, Thanatos.
Zeus- Hades- Poseidon
Hera- Ares- Athena
Apollo- Artemis- Aphrodite
Demeter- Dionysos- Hermes-Hephaestus