Donna Noble
The Trickster's Brigade serve the recurring "The Sarah Jane Adventures" villain, The Trickster. They also feed on chaos in time as the Trickster does. In "Turn Left", a Time Beetle, a member of "The Trickster's Brigade", attaches itself onto the back of companion Donna Noble, creating a parallel world where she never met the Doctor in "The Runaway Bride", leading to his death.