The discussion on Jenny's blog, if her Elspeth is a Mary Sue (I personally don't think so) made me wonder about Ella.
So I took the two tests mentioned by precie and here are the results.
Score for this test:
The Non-Sue. Your character is a well-developed, balanced person, and is almost certainly not a Mary Sue. Congratulations!
And for this:
Ella is only a little like you. She isn't really very cool: she blends into crowds, she hangs out on the fringes at parties, and wearing shades after dark makes her run into things. She may have sometimes thought that she was special, or destined for greater things, but probably dismissed the idea as a fantasy. She's come in for her share of hurt, but gotten off with minor damage. And she's gotten no slack from you.
In general, you care deeply about Ella, but you're smart enough to let her stand on her own, without burdening her with your personal fantasies or propping her up with idealization and over-dramatization. Ella is a healthy character with a promising career ahead of her.
I Love Her, I Let Her Go 5
You Mean Plaid Is Out? 9
I'm Destined For What? 5
Can't Complain 7
Momma HATES Her! 0
Although if you look at the questions, you'll find that they are sometimes difficult to apply to a character in a fantasy world (regarding eye colour, certain behaviour etc.) as that world listens to different rules than ours