Buffy Anne Summers was a Slayer who was activated in the late 20th century. Born on January 19, 1981, she was called to be the Slayer in 1996 at the age of fifteen. Buffy was originally living in Los Angeles; but, due to an incident involving a gang of vampires at Hemery High School, she moved to Sunnydale with her mother. There, she acted as guardian of the Hellmouth for seven years before the town's destruction in mid-2003.
Initially a reluctant hero who constantly wished for nothing more than a normal life, Buffy eventually grew to embrace her destiny. Buffy was unique as a Slayer in many ways; she refused to sacrifice her ordinary life for her supernatural destiny, often operated as part of a team with her friends the Scooby Gang, and had romantic relationships with notorious vampires Angel and Spike.
Buffy was one of the longest-lived Slayers and returned from death not once, but twice, then coexisting with another Slayer, an act that disrupted the magic surrounding the traditional line. During their war with the First Evil, Buffy enacted a plan to activate every Potential Slayer in the world, abolishing the traditional line of Chosen Ones, before dedicating herself to gathering and training the ever-growing number of Slayers. She created the Slayer Organization, protecting the world and Slayers when the supernatural had then become public knowledge.
Revealed she had been long involved in an ancient prophecy that would bring about Twilight as an evolution to replace the Earth dimension, Buffy prevented this destroying the Seed of Wonder, thus bringing about the end of magic. She established herself in San Francisco, where she continued her Slayer duties and eventually restored magic on Earth, taking responsibility for its new rules with the Vampyr book. Ultimately, Buffy was the Slayer that defined the battle of the Reckoning, which allowed Slayers to exist and work towards a better future, changing the course of history up to the 23rd century