Outside of a game’s length, one of the most effective ways to increase a game’s longevity is by giving players multiple branching story paths and different endings. Branching storylines and multiple endings are a great way of making the player feel like it’s their game with an experience that’s unique to them.
As Regis feared, his friend proved incapable of restraining his rage and killed his one-time love. He then said he bore no ill will towards Geralt and Regis and wished to go his way. The witcher let him do so. Regis decided to accompany his friend and followed after him, hoping to help him regain spiritual balance.
Dettlaff van der Eretein, also known as The Beast of Beauclair, was a higher vampire who was responsible for regenerating Emiel Regis Rohellec Terzieff-Godefroy with his blood and nursing him back to health after he was killed by Vilgefortz in the Assault on Stygga castle. Orianna, a bruxa living in Toussaint around 1275, was a good and longtime friend of Regis.
"Toussaint exists within the books, and Geralt spends some time there." Henry Cavill has said that he thinks Toussaint would be a good location for future storylines in The Witcher Netflix show to explore. “We don’t quite know what happens to Geralt at the end of the books,” he said.
Later on, when Syanna and Anna Henrietta meet in the palace grounds, you’ll have no way of stopping her from stabbing her sister, after which she is shot by Damien, the captain of the guard. If you investigate but fail to convince Syanna of her sister’s innocence, she stabs Anna Henrietta anyway.