Agella

Agella was a Movellan soldier. She came to Skaro on the Movellan ship with Commander Sharrel. When the Movellans encountered the Fourth Doctor, she accompanied him and the commander back into the Kaled dome to search for Romana II. When ordered to go with the Doctor alone, she was disabled by a falling ceiling. Checking her pulse, he discovered he was right about the Movellans being a race of android robots. Despite being a robot, Agella considered unnecessary killing a waste and unilaterally chose not to arm a bomb called the Nova device, which would have killed Romana, as the plan was to use it to lure the Doctor into a trap. The Doctor and the rebelling workers disabled the other Movellans and her. (TV: Destiny of the Daleks)