Gorrin

Gorrin the Cat was a Thief mentioned briefly in The Colour of Magic.

He was stationed on top of the gong tower of the Temple of Small Gods, and given the identification code "B12". He sent a messenger raven to Ymor to tell him about the coming of Twoflower to the city, along with a box on legs and quite a lot of gold. Unfortunately for him, Ymor had already heard of this from another source, and knew that Twoflower was staying in the Broken Drum. Which meant that Gorrin had deserted his post and gone down to the Drum for some beer. This did not make Ymor happy, and he ordered Stren Withel to discipline him...

He owed Cripple Wa three "copper pieces".