During your travels around the world Fallout 4 can be found unusual robot named Buddy, the main purpose of which is to be a good drinking buddy. He knows how to cook cool beer (the range can be increased with new recipes) and tell funny jokes.
Him you will find during the quest Trouble Brewin in the location - bar "Clover". You decide whether to keep it and send it to your settlement or selling quest robot Neighbourhood hotel. In the video below you can see the location of the robot companion and a demonstration of its capabilities.