Hostess (Midnight)

The Hostess was a human who served the beings who wanted to go to the planet Midnight, via shuttle bus. When the ship was attacked by the Midnight Entity it possessed Sky Silvestry. She was the first person to suggest whether they should throw Sky out. She made her decision to throw Sky out after she realised that Sky was still possessed and had stolen the Doctor's voice and gave her life to defeat Sky by throwing herself and Sky out the shuttle door.

After her death, the Doctor asks the surviving passengers, "The hostess, what was her name?" To their regret, none of them had asked before and found out. (DW: Midnight)

The Doctor would later remember her, as Davros reminds him of the many people who have died for him during the 2009 Dalek invasion of Earth. (DW: Journey's End)



Behind the scenes
The death of the Hostess is similar to the death of the Doctor's companion Katarina.