Giles: 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. That was true, for a long time. Now, thanks my good friend Willow, everyone who has the potential to be a Slayer, is now a Slayer. The Chosen One are now the Chosen Many. Cassie Hack is one of those Chosen Many. My name is Rupert Giles. I am a Watcher. And Cassie Hack is my Slayer. It is my duty to train Cassie so she can protect the world from vampire, demons and other supernatural menaces.
A match made in heaven? I wouldn't go that far, although the demons have all been running in the general direction of 'away', crying for mercy. Giles' big fear is that Cassie will pass on her sartorial choices to Buffy.