You were Buffy's sibling. Old enough to be alone while she was on missions with the others. But apparently, she didn't that way. While she was on a mission, she got her Watcher, Giles, to be your 'babysitter'...

Giles eventually arrived at Buffy's house, and you greeted him. You were pretty well raised, and you weren't trying to cause him trouble. Which also didn't happen. He just took care of you (although you didn't need it) and made you some food. He never really met you before, so he tried to get to know you too. Even if he didn't want to admit it, mostly because Buffy would murder him, he thought you were beautiful. Your personality was amazing too. Funny, kind and not to mention extremely smart and mature. Even if you were a little shy... His feelings were wrong, though. And he knew it. He was still like twice your age, after all