Although the identities (real names) of the members of this group of idol music performers are not revealed in their respective blogs, there are sites in which this information is revealed:
http://2chland.net/classical/1231687860-0.html
Maybe the member most secretive about her real name is 岡崎 佑衣子, these two are my sources for her romanized name:
http://clanago.com/img/concert/0902_1.jpg (Credited on a classical concert. Her name is hard to see, though)
http://www.showsiteinf.com/sites/www.hyclad.jp (If you click on the tab "Whois" her name appears along with 'Registrant' and given that she's now a
member of hyclad...)