The god HADES (In Greek mithology) is the god worldwide noun for his kindom in the UNDERWORLD. You may also here Hades’ Roman name that isPluto, which means “rich one” and his parents are the titans named Cronus and Rhea. Hades is one of the six original Olympian Gods and one of the three mostimportant gods in Greek mithology. Hades had three sisters named Demeter, Hestia and Hera and two brothers named Zeus and Poseidon. They were allbrothers and sisters and they form what I told you before the six original Olympian Gods but, only the three brothers Zeus, Poseidon and Hades are the tree mostimportan gods in Greek mithology. The word Hades for the greek people means “the useen” and the god Hades was a fearsome figure for the people that werestill alive.
Hades and his brothers recieved there powers or weapons from there Cyclops: Zeus recieved the Thunderbolt, Poseidon recieved his Tridentand the one we are talking about, Hades, recievd his Helm of Darkness. One of the powers that the Helm of Darkness has is that it makes you invisible andthat weapon is also one of Hades most used symbols also as the three headed dog (named Cerberus) and the symbol of the throne. Some other symbols ofHades are Cypress, Narcissus and the Key of Hades. Hades was not only the god of the dead, underworld, etc. but also, he was the god of the Earth’s hiddenwealth meaning, from the fertile soil with nourished seed-grain to the mined wealth of gold, silver and other metals.
Sources: Wikipedia and Theoi.com