I can't recall any specific cases yet of other DCs behaving as though they're dreaming and lucid. Usually when I'm lucid any DCs (when they're present at all; often I'm simply alone unless I specifically seek them out) will mind their own business unless I approach them first, and then they'll usually pretty much accept or play along with whatever I say and believe, including the fact that I am dreaming.

But for whatever reason, DCs in my lucid dreams often feel a bit like robots and are either unresponsive or tend to give imprecise responses which are often irrelevant or make limited to no sense in context, a bit like talking to a software chatterbot. I hope to someday encounter more “intelligent” DCs when lucid, as this could result in some interesting and worthwhile conversations.