Anya. I feel like I could go to her, give her a two sentence run down on the sitch and she'd tell me what I need to know, where as with Giles, no matter what, I'd end up with a long lecture and lots of info that I probably didn't need to know.
I say this as someone who is something of a Giles myself. I was a science educator and my poor kids would get a LONG science lesson all the time when they came and asked me some simple questions. I drove them crazy.