De Maggio

De Maggio was an officer in Bywater's security detail in the Vault, in Henry Van Statten's underground base. She was charged with getting Rose Tyler and Adam Mitchell to safety after the Dalek broke free. Having slaughtered her comrades, the Dalek caught up with the fleeing trio in a stairwell. Relieved, assuming the Dalek couldn't climb after them, they were astonished when it began to elevate. De Maggio sent the youngsters on, trying to negotiate with the Dalek, to no avail. Finally, she opened fire, and it exterminated her. (DW: Dalek).