Hades

Hades is the Greek god of the Underworld and Lord of the Dead. He first appears in Skin Game.

Description
Hades is described as a tall and imposing man dressed in a "black suit" who is "seven feet tall if he was an inch" Hades power is also seen in his posession of a crown made of Mordite.

First encountered in Skin Game, Hades is presented as the owner of the vault which serves as the focal point of the story. Hades is depicted as an individual with simple but elegant taste, his chambers being fit for a "Spartan King" and his furnishings being "few, and simple" but "exquisitely crafted of nothing but the finest materials."

Hades is depectied as being severe to the point of harshness but never past the point of necessity. While his siblings often shirk their duties, Hades upholds his charge with fairness. While no longer recieving the amount of souls h once did, with the majority of new souls coming from those attempting to access his vault, he still continues to see to his duty.

Skin Game
In Skin Game, Hades is the god of the Underworld and collector of treasure, rare, valuable, and powerful items. He stores them in a series of heavily-guarded vaults. His magical collection include the Holy Grail, coveted by Nicodemus Archleone. He keeps the weapons in an armoury away from incompetent individuals, only to be released to the right hands at the right time. He works along with Mab and Marcone to set up Nicodemus and grant Dresden with access to all the weapons.

He also wishes Dresden good luck, apparently viewing Harry as a bit of a kindred spirit due to Harry's role as the Warden of Demonreach, a role which bears notable similarities to Hades's own responsibilities over the Underworld.