Alexander Harris

Xander was Willow's best friend since they were five and fancied Buffy ever since he first saw her. I'm not sure if he is completely over her even now. He never excelled at school and his home life was rather dreadful (on Christmas eve he always slept outside the house to avoid his family's drunken Christmas fights). Becoming a part of evil-fighting gang was the best thing that ever happened to him. They were his real family, and he always looked at Giles as being his father figure, although Giles just found him extremely annoying!

Spike
The neutered vampire
Aka William the Bloody

Aww, Spike. Probably the most charming vampire in history. His arrival in Sunnydale was spectacular. Clad in black and red, he sauntered into the lair of a local vampire clan, casually punched some faces, bragged, joked, talked about Crucifixion and Woodstock in the same sentence, was caring and loving to his sick mentally disabled girlfriend and looked HOT. And that was just the first scene.

Anya
The Vengeance Demon
Aka Anyanka, patron saint of women scorned

Anya was born some eleven hundred twenty years ago. When she turned her nasty, dumb, cheating boyfriend into a troll with the use of some handy folk magic, the high demon called D'Hoffryn gave her a job of the Vengeance Demon. The package included wish-granting powers, teleportation skills, nigh-invulnerability and immortality! Not bad at all! I think we all know what we will do if our men start fooling around, do we, girls?

Rupert Giles
The Watcher
Aka Ripper

Giles is Buffy's watcher, he was appointed by the Watcher's Council to train and guide her. The Council fired him because he loved Buffy like his own daughter (I guess they thought it was a bit unprofessional), but he stayed by her side helping her with his vast knowledge of demonology and his dry British humour. And looked pretty good doing it.

Buffy
The Slayer
Aka Elisabeth Ann Summers

In every generation there is a Chosen one. She alone will stand against the vampires, the demons and the forces of darkness. She is the Slayer.

Our Slayer is a cute petite blonde called Buffy, and any dark force that decides to mock her name, height or fashion sense would be a total idiot.

She is supernaturally strong and fast, expert in hand-to-hand combat, good with a crossbow and rocket launcher, has amazing healing powers, and is a true leader. She also sometimes has prophetic dreams. And yes, some are wet.

Willow Rosenberg

Willow Rosenberg is Buffy's best friend and a most powerful witch in Western hemisphere! As she said herself, "Hard to believe such a hot mama-yama came from humble, geek-infested roots" (All the Way), but six years ago she used to be painfully shy, had a massive crush on Xander and let her mother choose her clothes. For a while I was wondering if Willow's mother was colour-blind or just did not like her daughter very much. Or maybe the weird clothes were a ploy to repel the boys and ensure Willow's chastity.