Hades

 Hades is the god of the underworld. He is the brother of Zeus and Poseidon. He is also the ruler of the  dead. In Greek mythology all the people who died would go to the underworld. He had a helmet of invisibility. He rarely left the underworld. He was married to Persephone. His father is Cronus.  He abducted her to let her change her on marrying her. At first she didn't want to marry him.