Death (Discworld)
Death has appeared in every Discworld novel, with the exception of "The Wee Free Men" and "Snuff", and had a possible cameo at the end of "Johnny and the Dead" (the character was not identified, but spoke in unquoted small caps). The Discworld books with Death as a leading character, starting with "Mort" in 1987, are:
Discworld gods
Azrael, also known as the Great Attractor and the Death of Universes, is apparently not a worshipped god on the Discworld, but he exists nonetheless, and is an entity of enormously unthinkable scope and size. While in the "Discworld" novels there are many 'Deaths' for different worlds (themselves divided into Deaths for different creatures), Azrael is their ruler. All other Deaths are aspects of him (a similar relationship to that between the Discworld Death and the Death of Rats).