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:
Lady Death
Lady Death finally ended Lucifer's control over her by casting him through Heaven's Gate (a place where evil cannot go), and in doing so became the new ruler of Hell. Many of the beings living in hell believe that the ascension of Lady Death signaled the beginning of the age of judgment – the final battle between good and evil for the fate of the Earth.
Since 2005, Avatar Press has published Lady Death titles. Since they only have the rights to Lady Death alone (without the rest of the Chaos! Comics characters that were so intertwined with her original story), Lady Death has been given a new origin story, with notable differences to the story told at Chaos! Comics.