Hmm, english is not my first language so the meaning might be unclear. I meant that she looks awkward/bashful and not confident. Maybe the picture of power girl in my mind is incorrect, when I think of her I would think more confident looking like these:
http://www.dccomics.com/media/desktop_patterns/Justice_Society_of_America_9_800x600.jpg
http://www.dccomics.com/media/desktop_patterns/Power_Girl_1_800x600.jpg
http://www.dccomics.com/media/desktop_patterns/Infinite_Crisis_2_800x600.jpg

Maybe I'm just having a instinctive bad reaction to "women/girls of marvel/dc/etc." pictures.