Dunaan

From the Lyorn Records of the Dragaeran Empire

A Jhereg assassin. Originally tasked (one assumes) with killing G'aereth or Gyorg as part of Garland's plans. Later he was also given the mission of recruiting and betraying a naive young assassin by the name of Mario. After Leen, Chaler, and Laral all failed, he was given the task of killing Khaavren. Unfortunately for Dunaan, Mario exacted his revenge at the exact moment of his strike, and died at the feet of his intended target.