A Slayer in the television series Buffy the Vampire Slayer and Angel, is a young woman bestowed by fate with supernatural powers and abilities that originate from the heart, soul, and spirit of a pure-demon. From Wikipedia
Under the working title New Sunnydale, the pilot reunites Buffy Summers star Sarah Michelle Gellar with 15-year-old Ryan Kiera Armstrong as the new Slayer under an all-female creative leadership team.