The Heroes of Brindol
Reluctantly acting as the Captain of the Guard
Sergeant Collins has a reputation in the towm as being a guard who follows the letter of the law, and has a high moral standpoint.
Even when drunk, which happens often, he follows the letter of the law to the utmost.
During the attack on Brindol he had the responsibility of Captain thrust upon him, something which he has admitted to the party he is not ready for (or indeed capable of).