@Shin Asuka: Thanks to Shin Asuka for providing the mirror links directly for her Miss FLASH 2013 DVDrip, already koped those d/l links from Taruhei's original post on A-O awhile back. And what a mighty fine DVD it is. She will no doubt become more popular in days to come, here's hoping more magazine publishers will take note of her soon and approach to do more photoshoot coverages with her.
@3q3q: Yep, Misaki Nitou and Chika Tono too. I haven't noticed Mai Hakase much because I don't think she turns up on gravure magazine coverages that often, thought I do somehow recognise her full kanji name. Did a search on Beauty Boutique on SLF and while she does have some full digital sets released under image.tv, Sabra.net and one Bomb.tv set from last year, her exposure on the regular magazines are quite lacking which is why I think she's not that popular in JP at the moment.
The case is abit different for Misaki Nitou/Chika Tono though, as Misaki Nitou has already released quite abit of DVD works from 2011 to 2012 (with her latest DVD in Dec 2012), is a regular model for KIKS TYO officially and is usually spotted often on well-known gravure magazines like Young Animal/Weekly Playboy/DVD Yoroshiku!, even releasing full digital sets from Sabra.net or image.tv as their regular model. Chika Tono is pretty well-known for her RQ work, having released quite a few TopQueen digital sets as well as various magazine shoots/gravure DVDs, so I do think both Chika Tono and Misaki Nitou are enjoying quite abit of popularity in JP as of now.
Awhile back I manage to dig up one of Rina's DVD event coverages that was originally filmed by Idolcheck.net previously held in February 2013 at Sofmap's building, and in this DVD event for her
Marugoto Sinderina 5 Maigumi Complete Pack, there is this particular mention under the video interview (at 2.04 min) by Rina that she actually looks up to Risa Yoshiki-san as her future goals/work ambition. I believe she admires Risa-chan because Risa is such a talented girl, who has good vocals as well as the looks, and is a recognised all-rounded TV entertainer now as well. I suppose this probably means that Rina Nagai has scored a few more points in your heart now probably?
And nope, to answer your previous question I haven't seen that latest TV variety from your latest screencaps. I do however recognise Ruri Shinato (階戸瑠李) in the background of the TV show though, though I didn't manage to make out who's the other girl on the right.