Hades was the God and Ruler of the Underworld
Family of Hades
Parents: Hades was a child of the Titans Cronus and Rhea.
Siblings: Hades had five siblings. Two younger brothers (Zeus, Poseidon), and three sisters (Hestia, Hera and Demeter).
Wife: Persephone, whom he abducted from his sister Demeter and took with him down to the Underworld.
Hades, the Ruler of the Underworld
Hades was the Greek god of the Dead and, according to Plato,  he should be considered as one of the Olympian gods. Hades was the supreme ruler of the Underworld. Almost never did he leave his gloomy kingdom but was residing there instead, surrounded by darkness and silence...
Hades' helper was Charos, the angel of dead. Charos had the duty to transfer the souls of the dead with a boat over the River Acheron from the world of the living to the world of the dead. Furthermore, Hades had a dog with three heads which was named Cerberus.
Appearance of Hades
Hades had gloomy features. He had a beard and dark hair falling over his brow .
Symbols of Hades
The sacred symbol of Hades was his helmet, which helped him stay invisible. His sacred animal was Cerberus, his own three-headed dog.
The Roman name of Hades is "Pluto"