Aiden

Aiden was a witcher from the Cat School and very good friend of Lambert from the School of Wolf. During the events of the Lamberts tell Geralt story about his friendship with Aiden and his ultimate death. He revealed that Aiden was murdered by another Cat Witcher known as Jad Karadin. Geralt then helped Lambert to track Karadin down and face him. As it turned out Aiden received payment for a contract yet did not fulfill it. His death was as a matter of fact an accident since Karadin was ordered to bring him alive. It is up to Geralt to decide weather Lambert should avenge Aiden by killing Karadin or let him go.

Aiden is described by Lambert as "the best guy I ever known" meaning not all the Cat witchers were monsters. Aiden