Sir Grofi was a Time Lord, who managed the Test of the Time Lords. It was later found out the the test of the Time Lords wasn't an actual thing, but instead a plan by The Death to kill his son, The Beginner.
Test of the Time LordsEdit
Sir Grofi used a beam to get The Beginner to the test of the Time Lords, something he's been trying to avoid. He was standing next to a Time Lord when this happened. He made Mardock and The Beginner sit on a pair of chairs to teleport into the test. (Test of a Time Lord Part 1)
When The Beginner and Mardock returned safely, Sir Grofi wasn't there for unknown reasons. (Test of a Time Lord Part 2).