Buffy Summers

Name: Buffy Anne Summers
Age: 22
Family: Father – Hank Summers, Mother – Joyce Summers, Sister – Dawn.
Type: Human/Slayer
History: As a child, Buffy went through a phase during which she idolized ice-skater Dorothy Hamill, and was close friends with her cousin Celia until she died. Buffy started her high school career at Hemery High in Los Angeles, where she was a popular cheerleader; in 1996 she was elected Prom Princess and Fiesta Queen. That same year, Buffy was contacted by a man named Merrick, who told her that she was the Chosen One, the Vampire Slayer. Though Buffy was sceptical, it was true; Merrick was her Watcher. But Merrick was killed, and in Buffy's attempts at slaying, she managed to burn down her high school gym.
Around that time, Joyce and Hank finalized their divorce, and Buffy moved with Joyce to 1630 Revello Drive in Sunnydale. She enrolled at Sunnydale High School, where the school librarian, Giles, informed her that he was her new Watcher. Though reluctant, Buffy was sucked full force into the life of a Slayer.
Buffy became friends with Willow Rosenberg, Xander Harris, and to some extent, Cordelia Chase; and later with Willow's boyfriend Oz, all of whom knew that she was the Slayer (her mother finally found out at the end of Season 2) and often helped in her endeavours. Buffy developed a relationship with Angel, a vampire cursed with a soul; it ended when he lost his soul, turning him back into his evil vampiric self, but they got back together after his soul was restored again. Ultimately, Angel eventually realized that as Buffy got older, their relationship would be doomed, as he could never give her anything resembling a normal life. Thus, he left her, for her own good.
During her freshman year at UC Sunnydale, Buffy roomed with Willow and developed a relationship with Riley Finn. After about a year together, Riley left Buffy and Sunnydale, feeling that Buffy didn't need nor love him. During her sophomore year at college, Buffy survived several family crises — first she discovered that her 14 year-old sister (introduced in Season 5) isn't actually her sister, but is a mystical "Key" just recently turned into human form and placed into Buffy's life (false memories included) so that Buffy could protect her. Then her mother had a brain tumour removed, only to later die from an aneurysm arising as a side effect from her surgery. Buffy dropped out of college to take care of Dawn. In the final fight against Glory, a hell god seeking to use the Key, Buffy sacrificed her life to save Dawn's and the world. A few months later (Season 6), Willow brought Buffy back from the dead using dark magicks.
Unfortunately, Buffy had been at peace in a heaven-like place, and being ripped out and plunked back onto earth was extremely hard on her, to say the least. In an effort to feel something, anything, she secretly took up a sexual (and violent) relationship with Spike, who had fallen in love with her during Season 5. Spike didn't accept the eventual break-up very well and at one point ended up attempting to rape Buffy.
A trio of nerds (Warren, Andrew, and high school acquaintance Jonathan) who fancied themselves as villains, made themselves a nuisance to Buffy and the gang, culminating in Warren shooting and severely injuring Buffy. The same attack also accidentally left Tara dead, driving Willow over the edge. Buffy was no match for Willow's immense magical powers, and when Willow set out to destroy the world, it was Xander that got through to her and saved them all. Buffy has recently been hired at the new Sunnydale High School as a part-time counsellor for troubled students.