The Roxy Ollie Pop is so fun (rocker/camber hybrid with magnetraction...really nice for the east coast.) The Niche Minx is fun, lightweight and has lots of pop (flat camber). Arbor's Cadence is another great all around board (parabolic rocker also with grip tech which is Arbor's version of magnetraction.) That size range should be perfectly fine given her size and these are all true twins. Whatever you get for her will be worlds better than the rental stuff she is riding!