Arnout Vester also known differently as Brenden Vilfe, Appo Saxon or Manfred Whimplebottoms is a famous bounty hunter from the Nilfgaardian Empire hired by Emperor Emhyr var Emreis himself to kill the witcher Letho of Gulet. But the assassin of kings finds him first in Velen in the village Lindenvale. Letho describes him as following:
He prefers specific method of punishment - rip the teeth out, one by one, then cut the mouth open ear to ear. It's how they punish deadbeat debtors in the Imperial underworld.