Oh, man. Karin is a SHOE IN. Mark my words, we're looking at an 11th gen MMer. I said the same thing about Riho, in fact I had a theory that the only reason there were even 9th gen auditions was to have other girls go in WITH Riho (Riho won an audition to be in Fashionable, if you remember).
I would honestly be surprised if Karin didn't make it.
As for the rest...:
Fuyuka has an advantage for her visibility. That's it. She's not a great singer, or a great dancer BUT she's known. That's something
Nanami is pretty popular? I think. I remember when she auditioned and know who she is and if -I- know who she is she has to have some visibility. Too young though and looks too young. She's an okay singer. Doesn't look like she'd fit in with Morning Musume, but I've been wrong before.
Sayubee - I can't get over her face
. She's so funny looking, I've thought that ever since she came in. She''s of a decent age but she looks 11. Not a bad singer
Kaneko Rie - I've never heard of her, she's kinda plain, doesn't really stand out? I think she could be pretty though, given the right make over. Her voice is pretty but needs some work. She's alright, I wouldn't cry if she made it.