I really like the expressions (ooh, this feels familiar), and the bold, solic colors on the stained glass window really make it stand out. Sun's hair is very nicely detailed, and those wings look like they must've taken forever! The pillars add a nice sense of...um, architecture?...to the background, and really give you a feeling that they're in a church...and I don't know if it was intentional, but I like the way Sun seems to be sort-of standing on tiptoe to point to the window above her. ^_^