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)
Death's apparent age varies slightly. In the picture above, from "Death: The Time of Your Life", she appears to be a teenager. In most "Sandman" stories she looks to be in her mid-twenties. In the giveaway "Death Talks About Life" (an AIDS-prevention giveaway), Death appears to be about thirty, with wrinkle lines in her forehead that are not usually present.