It looks good... But Tifa's Giant tits are clipping through Riku's. My suggestion... Set some Driven keys (both Driven and Driver) on both their boobs, so that in the future instead of it looking like one is clipping into the other, they squish together! A Much nicer looking effect! ^_^
I honestly like what you did with Tifa's outfit. The tube top works surprising well for her. Then again she has the figure to fill it out. Rikku not being a very top heavy character her out fit mainly focuses on her lets. in a similar fashion to Yuffie.