I'll just vote for the ones I recognize.
1.
Matsui Jurina - For being a part of all things AKB.
2.
Matsui Rena - I thought she was cute in Tsuyoki Monoyo, but didn't try finding out more about her till after watching this show.
So I knew Rena could kick my ass, before I even knew her name!
(epic fight btw~
)
3.
Yagami Kumi - also from a show. The Nemousu SP in Oz (aka. The "I am not Chicken" episode!).
Really happy seeing this 15yo laugh through all the tasks.
4.
Hirata Rikako - solely based on her cute face.
5.
Shinkai Rina - solely based on her cute voice.
It'll take some time for me to start knowing SKE better (just like team K and B beforehand).
They are starting to have stuff coming out, so that helps.