Sheffield

Sheffield is a former alcoholic, sitting in the Diamond City market

Background
When the Sole Survivor first approaches Sheffield, they can hear him repeating that he is thirsty for Nuka-Cola. They can engage in conversation with him, where he shares that needs Nuka-Cola, but can't go into the Dugout Inn to purchase any, because he does not want to be around alcohol. He continues, saying that his doctor told him he can't drink liquor anymore, due to extensive damage to his liver.

One can give Sheffield a Nuka-Cola from their inventory, to which Sheffield will stand up and profess his gratitude, mentioning that now he can wake up, his vision is not hazy, and he can finally think straight. The Sole Survivor can ask Sheffield if he would like to work for them, to which he will be enthused, and can be subsequently sent to a settlement.

Appearances
Sheffield appears

Bugs

 * If spoken to after being recruited to a settlement, Sheffield may repeatedly thank the Sole Survivor for the Nuka-Cola, even if the bottle is taken from his inventory.
 * If assigned to work as a trader you will not be able to access the store. He will simply talk about Nuka-Cola instead. (NOTE: Sheffield does work as a trader, though there are hiccups due to his character never being assigned merchant dialogue. Half of his dialogue leads the Sole Survivor offering to come work for him and Sheffield repeating his thanks for Nuka-Cola, the other half leads to the barter screen.)
 * If Sheffield is kidnapped while assigned as a provisioner, he will be missing the required dialogue and won't say anything. This will cause him to stay put despite choosing the option to free him. Leaving him there for too long will cause the rescue mission to fail, the route between the settlements will become unassigned, and Sheffield will die.
 * After recruiting Sheffield to Sanctuary Hills, every first interaction between the Sole Survivor and Sheffield after traveling to Sanctuary Hills will always start with the Sole Survivor saying "Hey, Sheffield. What do you think about coming to work for me?", to which Sheffield replies with any of his generic responses as if he had not yet been recruited. All subsequent interactions by the Sole Survivor will then start with the usual "I just wanna trade a few things", until fast traveled away and back after a while. At this time the bug will occur again.