Qodron, Gate Lord
      
  "It is no prisoner. It is here with a purpose."
      
        Qodron sees only its own glorious future.  It has come to the Prison of Elders, with an army of devout Vex war-machines, to take what it believes to be its first steps toward that future.
This machine beast has only one mission. At some point a Light will shine within the walls of this Prison, and for its gloried future to unfold, that Light must die. 
Qodron is not the prisoner here. You are, Guardian.