The series narrative follows Buffy Anne Summers (played by Sarah Michelle Gellar), the latest in a line of young women chosen by fate to battle against vampires, demons, and the forces of darkness as the Slayer. Like previous Slayers, Buffy is aided by a Watcher, who guides and trains her. Unlike her predecessors, Buffy surrounds herself with a circle of loyal friends who become known as the “Scooby Gang.” buffy  one in a long line of young women chosen by fate to battle evil forces. This mystic calling endows her with dramatically increased physical strength, as well as endurance, agility, ease of healing, intuition, and a limited degree of clairvoyance, usually in the form of prophetic dreams.Buffy receives guidance from her Watcher, Rupert Giles (played by Anthony Stewart Head). Giles, rarely referred to by his first name, is a member of the Watchers’ Council, whose job is to train the Slayers. Giles researches the supernatural creatures that Buffy must face, offering insights into their origins and advice on how to kill them.Buffy is also helped by friends she meets at Sunnydale High: Willow Rosenberg (Alyson Hannigan) and Xander Harris (Nicholas Brendon). Willow is originally a bookish wallflower; she provides a contrast to Buffy’s outgoing personality, but shares the social isolation Buffy suffers after becoming a Slayer. As the series progresses, Willow becomes a more assertive character, a powerful witch, and comes out as a lesbian. In contrast, Xander, with no supernatural skills, provides comic relief and a grounded perspective. It is Xander who often provides the heart to the series, and in Season Six becomes the hero in place of Buffy who defeats the “Big Bad”. Buffy and Willow are the only characters who appear in all 144 episodes; Xander is missing in only one.