Death (Discworld)
Death is a fictional character in Terry Pratchett's "Discworld" series and a parody of several other personifications of death. Like most Grim Reapers, he is a black-robed skeleton usually carrying a scythe. His jurisdiction is specifically the Discworld itself; he is only a part, or minion, of Azrael, the universal Death. He has been generally used by Pratchett to explore the problems of human existence, and has become more sympathetic throughout the series.
Death (Discworld)
The Death of Rats, also known as the Grim Squeaker, is not, strictly speaking, a personification in his own right but rather an aspect of Death allowed an independent existence. His purpose is to usher on the souls of dead rodents, as well as assisting Death in other ways. His jurisdiction also seems to cover certain kinds of "ratty" humans, such as Mr. Clete in "Soul Music", Mr. Pin in "The Truth", and Mr. Pounder in "Maskerade".