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:
Death (DC Comics)
In "Captain Atom" #42 Death appears alongside Black Racer of the New Gods and Nekron (a being embodying the will of "The Black", the solitude and peace death represents from "Green Lantern"). The story stated that all three were equal, representing different aspects of death. Gaiman has denied this, however, and his stories make it clear that Death of the Endless is the ultimate personification of Death. It might be assumed, however, Nekron, the Racer, and the Black Flash are connected to her in some way. Alternatively, there may be multiple avatars or gods of Death in the DC universe, besides those claiming to be Death. Blackest Night has resolved this apparent contradiction or ambiguity, with Nekron no longer being referred to as an aspect of death but instead as a construct formed of darkness in response to the emerging light of the emotional spectrum.