The Sentinel of the Fifth Galaxy

 was a android built to oversee an army of Red Daleks on a planet in the Fifth Galaxy. The Sentinel bore witness to the last of the human slaves perishing to maintain the base before it entered a state of suspended animation.

When the Dalek Restoration Empire earned the ire of an entity and lost Skaro, the Emperor of the Restoration sent the Dalek Prime Strategist to reawaken the Sentinel and claim the army. The Entity however, existing outside of time, had arrived ahead of the Strategist and possessed the Sentinel. Through the Sentinel, the Entity attempted to bargain with the Strategist, offering to make him the new Dalek Emperor. The Strategist rejected the offer however and set the Sentinel to self-destruct. (WC: The Sentinel of the Fifth Galaxy)