Kuay

Kuay was a Dalek slave native to Anhaut. When the Daleks learned that Glax was making a movie about the Dalek invasion of her world which took place 800 years prior, they had her smuggle several of them onto the planet to exact their revenge. She followed Glax and Hok Nepo to the desert of Vaksh to stop them from learning how General Nor-Din defeated them. She destroyed Nor-Din's recorded message and summoned the Daleks to her location, but contact with a crystal helmet broke their control over her. Realising that the helmet was the General's telepathic weapon, she used it to destroy her former masters, at the cost of her own life. (DWM: Return of the Daleks)