Hades

Hades is the god of the Underworld.

History
Hades is the god of the Underworld as this was the only realm left after his brothers, Zeus and Poseidon, had claimed the sea and sky. He seems to resent them for this, and many other reasons. One of his most famous myths is the kidnapping of his niece and later wife, Persephone. He had two demi-god children, Bianca (deceased) and Nico di Angelo, but he did not break the oath, as his children were born before the oath was made, but were stuck in the Lotus Casino and Hotel, which seemed like a short time, but was really very long, as five minutes were really five days, as seen in The Lightening Thief.

Mistress and children
Hades must have loved Bianca and Nico's mother, Maria di Angelo, very much if he had two separate (as opposed to twins) children with her. He also seems to feel affection for his children, as described by Percy In The Sword of Hades in The Demi-God Files: "Hades turned back to Nico. His gaze softened just a little, like rock soft rather than steel. That shows he must love Nico, 'just a little.'

Immortal family
His relationship with his family has always been a little "difficult" due to his duties and his position as the loner in the family but after the prophecy was set Hades distances himself even more from his siblings especially Zeus who he develops a grudge against. This is because the prophecy said that a child of the Big three would destroy the Olympians so Zeus ordered Hades to hand over any of his children to Camp half blood to be "trained" for there own protection but Hades had a fairly good idea what that meant. His suspicions proved to be true when Zeus demolished the building that Hades, the children (Bianca and Nico) and their mother Maria where currently in. Hades was barely able to detect the attack and managed to save the children but Maria was killed instantly, something that up until recently Hades never forgave his brother for. It was also the incident that almost destroyed Delphi as it was she who gave the prophecy and it was she Hades focused his rage on cursing her to be trapped within her current host until it withered to nothing effectively killing her. The only act of mercy Hades offered on his children's part was to wipe their memories and hide them for there own protection in the Lotus casino.

His grudge with Zeus in part led to the first death of Thalia after it was discovered she was a child of Zeus effectively meaning she was a living risk and Zeus had broken an oath on the River Styx. Being a god Zeus got off lightly, but Hades angered by this and also possibly still angered by the death of Maria unleashed all the worst monsters in the Underworld to torment Thalia, leading to her sacrifice herself in order protect the other demigods she was traveling with. Though Zeus managed to keep Thalia from ending up in the Underworld by turning her into a tree.

Initially coming off cold and vindictive Hades in not evil like his father but rather distant and bitter due to past tragedies which leads him to behave the way he does. Though he doesn't show it Nico pointed out he was angry at the rest of his family for there treatment of him and he should prove himeself to be more than what they thought of him. Despite this he does show some care for his sibblings has he admitted to Kronos in the battle that if the Olympus was destroyed he would miss "bickering" with his brothers and sisters. He also told his father the one thing they could all agree on was that Kronos was a TERRIBLE father.

Symbol of Power
Hades's symbol of power is the Helm of Darkness, which allows him to become a shadow. This means he can pass through walls and melt into shadows, not be touched, seen or heard, and radiate fear so intense that it can make a person go insane or stop their heart.

In The Sword of Hades in The Demi-God Files it is revealed Persephone forged him a new weapon of power in the form of a sword.

Children

 * Nico
 * Bianca

Film
In the upcoming film The Lightning Thief, Hades will be played by Steve Coogan.