I just realised, that Karlach and Wyll have a full conversation with Tav included, if you click on Wyll with Karlach after her recruitment instead of doing that with your Tav/Durge. It is so much more fun. I wonder how many more hidden options like that exist, if you accidentally use a companion to talk to another companion. A lot of times, you can't even do that.

"We are all stories in the end. Just make it a good one."

Doctor Who