Rupert Giles is the librarian of Sunnydale High School in Buffy the Vampire Slayer, and the Watcher (teacher, guide, and general sidekick) of the Slayer, Buffy Summers. He is a book-lover, an expert on the occult, and he has a surprisingly hardcore singing voice compared to his normally gentle British tones. He gradually becomes a father-figure to Buffy and, to a lesser extent, her friends.

He is portrayed by Anthony Stewart Head.

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