Buffy the Vampire Slayer slayer. Buffy receives guidance from her Watcher, Rupert Giles (Anthony Stewart Head). Giles, rarely referred to by his first name (it is later revealed that in his misspent younger days he went by "Ripper"), is a member of the Watchers' Council, whose job is to train and guide the Slayers. Giles researches the supernatural creatures that Buffy must face, offers insights into their origins and advice on how to defeat them, and helps her stay in fighting form. Buffy is also helped by friends she meets at Sunnydale High: Willow Rosenberg (Alyson Hannigan) and Xander Harris (Nicholas Brendon). Willow is
Oz (Buffy the Vampire Slayer) Oz (Buffy the Vampire Slayer) Daniel "Oz" Osbourne is a fictional character created by Joss Whedon for the television series "Buffy the Vampire Slayer". The character is portrayed by Seth Green. Green also portrays the character in one episode of the spin-off series "Angel". In "Buffy", Oz is portrayed as a taciturn, guitar-playing teen who becomes boyfriend to Willow (Alyson Hannigan), one of the show's main characters. After first appearing in the episode "Inca Mummy Girl", Oz discovers he is a werewolf in the episode "Phases" and becomes a recurring character throughout the second season. Green is elevated to main