Mandos

Mandos is the Valar of the dead and deceased, those who inhabit the grave. All mortals must go through the Halls of Mandos before moving to their final destination. Those who have no destination end up staying in Mandos' Halls. Thus, he has the largest occupancy realm that has turned into a grand bureocracy. 
Additionally the Halls of Mandos border the planes of the Hells and Abyss, so many of his occupants are the defenders against the tides of evil.
He is married to Vairë the Weaver.

Divine Domains

Grave, Death, Twilight

Divine Symbols & Sigils

Skull overlayed on a tomestone

Divine Classification

Maiar

Alignment

True Neutral

Aligned Organization

The Valar