Page "Slayer (Buffy the Vampire Slayer)" Paragraph 1

The opening narration in the Buffy series states " Into every generation a slayer is born: one girl in all the world, a chosen one.

She alone will wield the strength and skill to fight the vampires, demons, and the forces of darkness ; to stop the spread of their evil and the swell of their number.

She is the Slayer.