Oh my gosh, I have dealt with this MANY times before! My mother had to speak with these so-called "experts", and they said that I had Asperger's. (VERY introverted, preferred to read when everyone else was talking/watching a violent, gory movie, when I did talk, I hugged or didn't look the person straight in the eye, and I was bad at reading social cues that involved slang or so-called "hot" celebrities.) My mom, however, was giving it a second thought, but just told the specialists at my school (which specializes in behavioral and emotional difficulties, as well as early learning) so I could get the help I need. I believe that she MAY have a PDD (sorry if that offended you), but sometimes, obsessing over characters in a book could be just one of the things that make her unique. (I sometimes obsess over this character in a manga.) But I DO think she is gifted. I've had expierience dealing with this! ^^

-Violet