Episode 3 and 4
Ok, Yukiho is hilarious, I'm starting to like her more.

episode 2

Idolm@ster

Episode 1 character ranking

I've seen two episodes so far. I'm ranking each character using this sort: http://idolmastersorter.tumblr.com/

Knowing nothing about the franchise prior to watching this, here is my ranking for the 1st episode: