Originally Posted by Renaire

They could also let you know when your comps want to talk to you at the camp so you don't have to check it every time yourself.


If gotten the impression that companions talking about being tired is the line used when they're ready to discuss something of importance. I'm certainly not sure about it, but since they don't get any tired debuffs (and there is no day/night cycle) or similar it doesn't fill any other purpose.