Giles (portrayed by #AnthonyStewartHead), rarely referred to by his first name, is a Watcher and a member of the Watchers' Council, whose job is to train Slayers. In the earlier seasons, Giles researched the supernatural creatures that Buffy must face, offered insights into their origins and advice on how to kill them. Throughout the series, he became a father-figure to Buffy, Willow, Xander, and the others, giving them advice not only on the supernatural world, but on life issues as well.