The spy. We couldn't go and make incorrect quotes without him. He is often in the quotes and he often makes dad jokes.

In this lore, he sees himself as a kind of Big Brother for Nora. And she sees him as well. Their bond is really strong, they can almost understand each other without words.

He is not particularly close to any other companions, except for MacCready. Together, they like to have a Comedy Club of sorts, rolling Dad jokes around those who dislike it the more-- Danse.

https://fallout.wiki/wiki/Deacon