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. The Dalek slaughtered her comrades and caught up with the fleeing trio in a stairwell. At first they thought the Dalek couldn't climb after them. Then it began to elevate. De Maggio sent the youngsters on, and tried to negotiate with the Dalek, to no avail. Finally, she opened fire, and it exterminated her. (DW: Dalek)