*Groan*
I really didn't want to write this but I feel I can draw a line under this franchise when I clear this hurdle, so lets be done with it.

Honoka is my main problem with the show as she shares her carefree persona with about 90% of shojo protagonists and brings nothing new to the role, she's the main reason why I hate this anime so much.
Eli's shtick of being the overly strict student council president has also been done to death, her character gives in way too easily to the idol group.
Kotori is the trademark rich girl with a hidden double life who goes along with everything, it's been done.
Umi is the straight girl of the group keeping the antics of Honoka in check whether she wants to or not, I'm surprised K-On didn't sue them for plagiarism.
Rin is the girly tomboy which I normally like but there's not much personality for it to work.
Maki is surprisingly well written which among this lot is surprising but like Eli she seems to surrender to easy.
Nozomi is basically Akeno Himejima from Highschool DxD before she became a devil, all that's missing is ara ara, at least she's interesting.
Hanayo is the shy, timid one, she literally has nothing else.
Then there is Nico, thank you, a character type that hasn't been done to death, in fact she's only one brave enough to call out the group on their performances and was actually useful.

Honoka Kosaka - 0.5/10
Eli Ayase - 2.4/10
Kotori Minami - 3.8/10
Umi Sonoda - 2.2/10
Rin Hoshizora - 2.9/10
Maki Nishikino - 7.9/10
Nozomi Tojo - 7.0/10
Hanayo Koizumi - 2.1/10
Nico Yazawa - 7.2/10