Geralt of Rivia is the protagonist of both the Witcher book series and the show. Geralt is a witcher, a monster hunter for hire who has been gradually enhanced through mutations that give him extraordinary, magical abilities. His mother, a sorceress, entrusted his upbringing to a community of witchers. Geralt grew up at the legendary School of the Wolf at Kaer Morhen, where he underwent extensive training from a young age to become a witcher.