Characters in Thud!

Sam Vimes

Investigating a politically explosive murder while something he cannot name begins influencing his thoughts and behaviour.

Also in Guards! Guards!, Theatre of Cruelty, Men at Arms, Feet of Clay, Jingo, The Fifth Elephant, Night Watch, Where's My Cow?, Snuff, The Last Hero

Carrot Ironfoundersson

Navigating the dwarf-troll tensions with his characteristic directness — increasingly the moral and operational centre of the Watch.

Also in Guards! Guards!, Theatre of Cruelty, Men at Arms, Feet of Clay, Jingo, The Fifth Elephant, Night Watch, The Last Hero

Angua

Managing the investigation's werewolf angle while Vimes deals with his own internal crisis.

Also in Feet of Clay, The Fifth Elephant

A.E. Pessimal

A tiny government inspector assigned to audit the Watch — and the novel's funniest running joke, which resolves in an unexpectedly moving way.

Nobby Nobbs

Also in Guards! Guards!, Theatre of Cruelty, Men at Arms, Feet of Clay, Jingo, The Fifth Elephant, Night Watch, Hogfather, Raising Steam

Havelock Vetinari

Also in Guards! Guards!, Men at Arms, Feet of Clay, Jingo, Sourcery, The Fifth Elephant, Night Watch, Where's My Cow?, Snuff, Moving Pictures

Fred Colon

Also in Guards! Guards!, Theatre of Cruelty, Men at Arms, Feet of Clay, Jingo, The Fifth Elephant, Night Watch, Reaper Man, Raising Steam