Hades was the God of the Underworld and as such could stop death, summon ghosts and raise the dead. He was known as God of the Underworld.
Hades was the son of Cronus and Rhea and the brother of Poseidon, Demeter, Hera, Hestia, Chiron and Zeus. His symbols include the scepter, drinking horn, and his three-headed dog, Cerberus. Hades was the oldest child in his family from his mother, and the youngest from his father. He came into power when he and his brothers defeated the Titans, after which they claimed to rule the universe. According to a passage in the "Iliad," after defeating the Titans, Hades, Poseidon and Zeus drew lots to see which of them would control the different aspects of the world. Poseidon drew the seas, Zeus drew the sky and Hades drew the Underworld.
According to Greek mythology, Hades was not the only God of the Underworld. He shared that distinction with Thanatos, Hynos, Persephone and many others. Hades, along with his brothers and sisters, made up the six Olympian Gods.
Hades "won" his wife Persephone using deceit and an abduction. However, as far as death went, Hades was passive and not at all evil as death was often seen to be.