"The Valet" was an entity who enforced The Trials and administered the rewards to those who succeeded. Angel smugly called him "Jeeves" when he became impatient with the being.
Behind the Scenes
He was portrayed by Jim Piddock.
Although this valet claimed to have never seen any challenger survive the first challenge he implies others made it all the way to the third challenge. This implies he is not the only one administering the trials.