[video]
Hey, that's not true at all. [ immediately, and not out of pity. ] ...Giles, he used to be my Watcher, and he's always been there when I needed him. I seriously would not have gotten anywhere near as far without him. And "Watcher" might sound like a magical voyeur, but he was just a totally normal human being. Real big on the books, but normal otherwise.
[ she takes a minute to think, and then she smiles and continues ] He and Xander are both just normal human beings. But I needed both of them when I -- when we took on the last Big Bad, Adam. Willow did a little magic and put all four of us together, and I... have never been stronger than I was with the three of them inside me.
Willow was the Spirit, obviously, since she's a witch. --A good witch. I'll get back to that. And Giles was the Mind. Xander was the Heart.
Buffy, meanwhile -- vampire Slayer and super-girl -- she was just the Hand. Not much good without those other parts.