Despite Geralt’s attempts to convince Renfri to leave, she forces his hand. In a brutal, balletic sword fight in the marketplace, Geralt kills Renfri and her gang.
As she dies, Renfri delivers a prophecy: "The girl in the woods will be with you always... she is your destiny". Spurned by the villagers and dubbed the "Butcher of Blaviken," Geralt leaves town carrying her brooch. The Fall of Cintra: Ciri’s Flight
Both parties demand Geralt kill the other, framing it as the "lesser evil." Geralt famously responds, "Evil is evil... If I’m to choose between one evil and another, I’d rather not choose at all".
The Witcher: "The End's Beginning" — A Tale of Two Monsters