Tedd Deireadh, the Final Age

It turned out that, while Avallac'h had not been entirely honest with the witcher, he was no traitor. Ciri had slipped off with him during the battle of her volition in order to - and please pardon the grandiosity, dear reader - save the world. She was convinced Geralt would never allow her to embark on this mad endeavor, and so decided she had to operate behind his back. All his promises and threats were for naught - there was no stopping Ciri once she'd made her mind up. The witcher could only watch as she stepped into the elven tower - and hope she would return safe and sound.