Camicaze in the how to train you dragon series (from about the 3rd book onwards). Apparently written specifically after Cressida Cowell's daughter berated her for the lack of good female characters. Brave, clever and funny - my daughter loves her! Also clever polly and the stupid wolf, Clarice Bean, Ottoline books by Chris Riddell, agent amelia, the worst witch, and don't forget Matilda by Roald Dahl! Can't do much older but plenty about for 7-9 yr old girls:)