This is a Girly Girl who has some tomboyish qualities or interests. She could have an interest in boys sports, hate the color pink or love boyish colors, not mind getting messy, be a Big Eater, or hate dresses and wear baggy pants. Perhaps she was once a tomboy who had a Girliness Upgrade and never did quite do away with aspects of her old tomboyish personality (in which case Tomboy Angst doesn't apply). In other words, this character has a girly appearance, but her interests are a mixture of girly and tomboyish interests, and her personality can swing either way.
Sometimes, Depending on the Writer, she may be the more boisterous one when that's usually the tomboy's job in their Tomboy and Girly Girl dynamic and the tomboyish one becomes more softspoken, though it doesn't always stick. Note that being an Action Girl is not exactly tomboyish by default, as a Lady of War and a Girly Bruiser can attest. Girly Gamer Chick might count in the context of Most Gamers Are Male.
Inversion and normal foil is Tomboy with a Girly Streak. Distaff Counterpart of Real Men Wear Pink, a Manly Man with a Sensitive Guy streak. See Otaku Surrogate if her boyish interests are used for pandering to male demographic.
