Qwa'ha Xahn was the title held by the high priest of the Old One, Illyria. Illyria's final Qwa'ha Xahn was Knox, the Wolfram & Hart scientist responsible for the demon's resurrection. Illyria's previous Qwa'ha Xahn had been taller than Knox. Her previous Qwa'ha Xahn was called Catari . He was the keeper of one of Illyria's holy sacraments that she needs to regain her primordial form. This icon was given to him by Illyria's killers and in exchange for his life he should ever give it to his master.