Vissing was a bandit. He was described as a very tall man, with a very long chin and nose that is the characteristic shape and colour of a radish. His nickname in the original Polish was "Łup-Cup".
He was an unexpected guest at Geralt and Yennefer's wedding in the short story Coś się kończy, coś się zaczyna ("Something Ends, Something Begins..."). He arrived carrying a large sack and his favourite club.