Although she didn't understand at first, her experiences were soon explained to her when she was approached at school by Merrick, a mysterious man who revealed her destiny as the "Chosen One" and became her first Watcher.
Buffy and Merrik initially butted heads due to his intolerance of her teenaged-girliness; however, the pair eventually gained a mutual fondness for each other as he trained her for battle against the vampire king Lothos.
Born in 1981, she was called to be the Slayer in 1996 at the age of fifteen.
When she was eight, she witnessed Celia's murder in her hospital bed by Der Kindestod, a demon that killed sick children and who was only visible to those who were ill.
At the age of fifteen, Buffy suddenly began having violent dreams about women from different historical periods slaying monsters.
During their war with the First Evil, Buffy enacted a plan to activate every Potential Slayers in the world, abolishing the traditional line of "Chosen Ones," before dedicating herself to gathering and training the Slayers she was responsible for creating.
A few years after the destruction of Sunnydale, Buffy, along with Angel, was involved in an ancient prophecy that would bring about the sentient "Twilight" dimension, destroying the Earth in the process.
There, she acted as guardian of the Hellmouth for seven years before the town's destruction in min 2003.
Initially a reluctant hero who constantly wished for nothing more than a normal life, Buffy eventually grew to embrace her destiny.
When Angel, possessed by Twilight, murdered her beloved Watcher and father figure, Rupert Giles, Buffy, enraged and grief-stricken, destroyed the Seed of Wonder, thus bringing about the end of magic on Earth.
Now considered a pariah among the remaining Slayers, Buffy has since established herself in San Francisco, where she continues her Slayer duties.
Shortly after her expulsion, Buffy and Pike took an impromptu trip to Las Vegas to hunt vampires.