Varn (The Invasion of Time)

Varn was commander of Castellan Kelner's bodyguard. Kelner ordered him to protect the Fourth Doctor at all times and report back with everything the Doctor said or did. (PROSE: Doctor Who and the Invasion of Time) He understood the extent of Kelner's plotting and knew he would be rewarded if he agreed. He was shot and killed by Andred. (TV: The Invasion of Time)

	Time Lord
	Bodyguard
	Chancellery Guard
	Gallifrey
	The Invasion of Time
	Michael Harley

You may be looking for the Sontaran or the Dominator.