A conman, fraudster, and convicted criminal who was given a choice by Lord Vetinari: be hanged (again, technically), or run the Ankh-Morpork Post Office. He takes the job. Moist has a genuine talent for making people feel good about things they should feel suspicious about, and an instinct for the spectacular gesture that turns out to be unexpectedly useful in the postal business. He finds, over the course of three books, that he is better at being useful than he was at being a criminal - and that this troubles him considerably more than it should.