Azazel

Azazel is a character created by Isaac Asimov and featured in a series of fantasy short stories. Azazel is a two-centimeter-tall demon (or extraterrestrial), named after the Biblical demon. Some of these stories were collected in Azazel, first published in 1988. The stories take the form of conversations between an unnamed writer (whom Asimov identifies in the collection introduction as himself) and a shiftless friend named George (named in The Two-Centimeter Demon as George Bitternut).