I would make her a little less perfect, as well. In some books I found her to be borderline Mary Sue, to be honest. Come on, the sub-temporally grounded estreen who is practically psychic? And her biggest screw-up, giving the Yeerks the escafil device, magically turns out to be something that works in the Animorphs' favor a book later. (But you know, it kind of indirectly gets Rachel killed, but nobody mentions that.)