Buffy Anne Summers
From Tardis Wiki, the free Doctor Who reference
Buffy was a fictional vampire slayer and the eponymous character of Buffy the Vampire Slayer. (PROSE: The Glass Prison)
Slake referred to Samantha Jones as "Buffy the Vampire Slayer" after she killed Weird Harold in San Francisco in 1997. (PROSE: Vampire Science)
Rose Tyler, while fighting a Mantodean, thought to herself, "Forget Buffy, this was Rose the Giant-Insect Slayer." (PROSE: Winner Takes All)
In the Main Hall of Geath, Rory Williams said that he and the Eleventh Doctor fought "the odd vampire", to which the Doctor replied, "Technically, they weren't vampires. Do I look like Buffy?" (PROSE: The King's Dragon)