Brehen

Brehen, also known as the Cat of Iello, is rouge witcher from the Cat School. During his training he suffered not entirely successful mutation. Like most of other Cat witchers he was known for his cruelty and had no qualms about killing people. In "At the Boar and Deer" inn he confronted Geralt of Rivia believing the Wolf want to go to King Foltest to take the Striga contract. He even went so far as to take a hostage to force Geralt to duel. He eventually failed and was forced to leave.

During their conversation Brehen implies that he is no longer welcome at the Cat School. He also believed that Vesemir issued a death sentence on him.