Is it possible to take Danse as a companion, passing through the subway? (Fallout 4)

bibaiboba
There you need to complete a certain number of missions for the BS. About 2-4 no more. I fulfilled and even got access to Privden, and then I crossed over to the Underground. On your question, I will not answer for sure - there are key quests with the plot after which a certain group will be hostile until the end of the game.

oleg199966
Thank you very much, happiness to you, daughters, wife

bibaiboba
You can. You must complete quests for the boss.
When you get to Pridwen, then Hitler .... oh Maxon will demand .... but I don't want to spoil you though.