Based on these videos, here are my picks:
#6 Noriko Kadota - Honestly, she seems kind of retarded, but it makes her interesting. She's like a weirder, less energetic Umeko.
#12 Kaoru Gotou - She seems really comfortable in front of a crowd, and her spazzy, hyper personality is interesting. It may need to be toned down a bit, though.
#14 Manami Nomoto - I busted out laughing when she was just standing for a few seconds with that goofy looking smile. That alone is enough for me to vote her in.