Death

Due to his advanced age, Death is completely detached from the rest of the universe. He even compares Dean to a bacterium. He cares little for major events of the world like the Apocalypse, and despite his coerced involvement by Lucifer, he only pays the events vague interest, resulting in his tendency to wander off from his assigned targets. Unlike the angels or Lucifer, Death considers the Winchesters and their involvement in the Apocalypse highly insignificant in the grand scheme of things. However, unlike his siblings, Death is shown to have a more civil and calm manner when dealing with the Winchesters; Death tells Dean that most people also talk to him with respect. Instead of attacking Dean during their encounter, he invites the Winchester to join him at the table to discuss the Apocalypse and even goes so far as to share his pizza with him. Death also claims to be an acquaintance of God Himself, claiming that the two both share a similar advanced age to one another and that neither of them can remember which is older anymore or even if they are the same age. Despite being callous at times, Death has a respect for the natural order of the universe. He explains to Dean that there are times when it is difficult, but in the end, breaking the order in even the smallest way can cause untold chaos.

Death is dressed in a dark business suit, as opposed to mortician wear which the reapers (except Tessa and rogue reapers) are clothed in. He also carries a steel tipped cane and is indeed very thin like Bobby's wife described.