Hee, when I was responding to you, I was thinking Mary Sue. But I'm not sure that's quite accurate, I think it's partly that, and a lot of Aly being Joss's pet. And the writers finding it hard to be objective about anyone not falling for her cuteness. She even manages to wriggle out of singing in the musical, when all the other terrified actors have to just suck it up and deal. (Or, in the case of Michelle, offer to dance instead). Ally didn't really have to do any extra work for that episode, yet Joss still gushes in the commentary about how she had the harder role in having to respond to Amber's singing.

But anyway *g*