Hermione Granger, the Harry Potter series
In the Harry Potter books, Hermione starts as an insufferable know-it-all, blossoms into a whip-smart beauty who doesn’t suffer fools (except Ron), and ends up as the glue that holds the whole operation together. Hermione’s steadfastness and sheer intelligence (plus the fact that she’s the only one who has ever read Hogwarts: A History) save her two best friends time and time again, and she’s the only one of the three never to wholly break down in a crisis. Intelligence often translates into strength, but only when wielded by a steady hand — and Hermione just happens to have both, and compassion to boot. That’s our kind of girl.