I go into more detail a bit elsewhere in the thread. She becomes hysterical about Draco, indulging some bewildering sort of friend-jealousy or romantic precociousness, moralizing to an unforgiving degree that she cannot possibly endorse if she thought about it for thirty seconds, making sweeping unsupported assertions about human psychology, determining of a sudden for no reason that Harry was supposed to be Science Monogamous with her, throwing a tantrum that is not necessarily age inappropriate but is not in keeping with her typical level of personal maturity, making their genders way more salient than they needed to be (she does throughout the fic, it's weird), identifying herself for some reason as a "poor innocent little girl" victimized by a question that she just made relevant enough for Harry to ask...