This would be the character Molly from Brian K Vaughan‘s “your parents are evil” series Runaways. As you can see, Molly’s exceptionally strong and not afraid to save ducks in a row.
This cover art is by Jo Chen. Her work is just this side of awesome in my book.
BTW I read that Joss Whedon’s taking over Runaways when Vaughan leaves. Guess I won’t be dropping that series any time soon.