Thel 'Vadam (formerly Thel 'Vadamee), often simply referred to as the Arbiter, is former member of the Covenant Empire and a member of United Alliance of Orion Species. Thel, like all Elites, is keen to do things in an honorable manner—though he is more flexible when it comes to equipment, weapons, and vehicles. His hatred of the Jiralhanae doesn't seem to be as strong or destructive as that of other Sangheili; one example of this is when the Arbiter tried to reason with Tartarus in Installation 05's Control Room. He is shown to be true to his title "Arbiter" as he often tries to negotiate with some of his other enemies (Drones, for example) and will only kill when forced to do so. He has deep respect for his fellow Sangheili and a grudging respect for the humans, specifically John-117 and Sergeant Johnson.