Anyone with a youtube video of the Karlach ending where Tav asks her if she wants to stay and die in the material plane or go with they (tav) to avernus?
I like her reply there and its a good argument on how Karlach grew from being absolutely against ever going back to really putting her desire for a emotional relationship with Tav above her own personal fears of Avernus.
I believe there are a few on youtube if you just search "Karlach Endings" and yes, that's basically how it goes. Same with Wyll asking her, Tav says "It's Karlach's choice" and she chooses Avernus over dying. Her will to live trumps her denial of returning to Avernus.