When the game writes its own ' ReverseRole!AU fanfiction'... - BG3 Epilogue

Origin Duke Wyll and 'went to Avernus w/ Karlach' Astarion (vampire spawn) dialogue from the epilogue.
I don't really have an explanation for this one, we just thought it was nice/funny that we could have a end game state when instead of a vampire lord in baldur's gate and a 'self-sacrificing hero' Wyll going to Avernus w/ Karlach, we could have a duke in baldur's gate and a vampire supporting his favorite tiefling in the hells xD