Coën was a witcher from Poviss who spent his first winter at Kaer Morhen when Ciri was in the keep. He trained Ciri in sword combat. His features are described as unusual for a witcher, as he retains scars from early childhood diseases, like chicken pox, which he covers with a beard, while most witchers were immunized before contracting such illnesses. This would suggest that he either contracted the disease unusually early in life, or that his witcher training began later than most.