I love it! The composition is very teasing - Faith standing in the center, next to Xander, is particularly riveting :)

I'm awed; multi-character fics are so hard to map out! And you write a story with 11 characters who have such complex relationships in canon. *envies u*

cropping round Giles sucks

But it might be a halo, or a residual aura. Are you sure that Giles didn't do magic recently? :)