Violet Hardaker

 was the deputy leader of the human empire. She wanted Horobin to increase output damn the consequences. She attended Vislor Turlough after the time explosion but then ran away. She talked to the Prime Minister about got the Fifth Doctor the bomb he needed to stop the explosion destroying the universe. She wanted the planet destroyed as a contingency plan to keep having money. She sacrificed herself to save the planet. (AUDIO: The Blazing Hour)