you should have gotten a bottle of water from the vending machine before the interviews like i did
but yes the interview was long and i definitely needed my water or else i would have been extremely hoarse by the end of the interview (especially since i seem to talk loud and quite often haha).
other than that basically all of what sparkly said, definitely be prepared for anything. My interview was much more conversation like rather than drilling me with questions. We talked about everything from the basic ethics questions in the interview feedback to fashion to random off the wall questions to an intense discussion of my major (she even had one of my old text books on her shelf but alas i had forgotten much of that class
😱) to what I though of their school website and what my favorite section of it was. There was basically no limit to the vast array of questions and topics we covered.
My tips would be look over the interview feedback thread (be prepared for some of the ethics questions but dont study it too hard). Also, know your supplemental questions and your personal statement...be prepared to talk about anything you may have mentioned in there. Just go in, have fun, and be yourself.
Good Luck!!!