Vesemir is a supporting protagonist in the Witcher franchise. He is an elderly, highly experienced Witcher and the mentor and father figure of Geralt of Rivia. Like many of the other witchers, he spent each winter in the fortress and set out on the path when spring arrived. He is one of only a few surviving witchers left in the 13th century, along with Geralt, Lambert and Eskel. Like Geralt, he trained under the School of the Wolf.
He is voiced by William Roberts.
Vesemir is the only one of the old witchers to survive the assault on Kaer Morhen. However, as he was only a fencing instructor, he didn't possess the knowledge necessary to create new mutagens in order to mutate more boys into witchers, hence why they are now nearly extinct.
Vesemir is the oldest and most experienced witcher, possibly older than Kaer Morhen itself. He spends each winter in the fortress and sets off on the road when spring comes, just like all the other witchers. Despite his age, Vesemir is robust and lively. Many youngsters could envy him his health. An excellent fencer, he was the one who taught me swordsmanship. He has raised many witchers, including me. His disciples treat him like a father. Leo was probably the old witcher's last protégé — the boy's death shocked him. He was one of a few to survive the assault on Kaer Morhen. He is well aware of the magnitude of the hatred some people feel for witchers.
~ Vesemir's journal entry in the first game
In the first game, Vesemir is one of the first people Geralt speaks to upon arrival at Kaer Morhen, and he is the one to guide the amnesiac through his first few uncertain steps around the keep. He also tells the witcher about skinning monsters, an extremely useful skill throughout the rest of the game. Of no less importance is the fact that he introduces the character of Berengar to the plot while filling our hero in on his forgotten past.
Vesemir features prominently in the prologue and can usually be found wandering around the main hall on the ground floor of Kaer Morhen, or in the basement in the laboratory.