punk
rocker dude back in England, and he joined a cult, raised a demon, it killed people, 
and he
reformed into a boring librarian. His one true love, Jenny was killed by Buffy's one true
love. Giles is not your average
school librarian. He is a Watcher, the guy who must guide Buffy, yadda yadda yadda.
He manages to sneak several thousand demon books into the Sunnydale School's
library, under the noses of what, a few dozen teachers? What a screwy school.
He lives for books, and will have nothing to do with those devil boxes (no that's the TV,
the computer is the friendly box). He was a punk
rocker dude back in England, and he joined a cult, raised a demon, it killed people, and he
reformed into a boring librarian. His one true love, Jenny was killed by Buffy's one true
love.
Giles is played by Anthony Stuart Head, and his accent is real! Yeah! He has a big acting credit from England, and lives half and half between England and LA, with his g/f Sarah (not Buffy) and their 2 daughters.
Link? Rupert Giles, Master Librarian is good.