itll be sort of like a work interview wont it?
"why do you want to come to this school?
whats your favorite sub?"
etc etc
Just be calm and collected, prepare yourself mentally. She is a nice person, it'll be all good. Don't say anything negative though, like "what do you dislike about yourself the most?"-turn it into something good. Try and not fidget, be polite, well mannered and enthusiastic (im sure you are already all of these =P)
all the best ^-^