It was Dinb's duty (among others) to discourage the occasional Teckla visitor who desired audience with the Emperor. (This, despite the fact that it was theoretically every citizen's right to speak to the Emperor at any time.) It should be noted that although Dinb was considered 'a cold and emotionless' man, and despite his imposing look and size, he never beat any Teckla. His methods were far more subtle and relied on intimidation and gentle discouragement of the prospective petitioner.
On a more personal note, Dinb showed little interest in anything except his two pet fish.