Symbiotic Witcher

Your father asked for a witcher named Geralt for help and once the job was complete Geralt invoked the law of surprise. Years later Y/N L/N was training Kaer Morhen with a girl named Ciri, Y/N was a fast learner and was always with Ciri, but when she left Y/N Trained until he was able to take the trial to become a witcher. During the trial he disappeared without a trace never to be heard from again until he met Geralt again at a bar looking for Yennifer.