Yeah Kurumi is a former Tochiotome25 member. She was named also as "The group's youngest" - she's born on March 16th in 1999. She graduated the group 30rd June 2014. Her last blog-post: http://ameblo.jp/toc...1886640750.html
She was member almost right from the beginning, 2011, and her last release was LOVE♥Tochigi-album which contains all of the Tochiotome25 songs: Tochiotome25 no Theme + all 3 different b-sides, Ichigo Hakase + all 3 different b-sides and GYO-ZA PARTY + 3 different b-sides and Dokkaan! Ichigo Sakusen!. So yes, Kurumi is in every yet linked video here
Here's also her last profile from T25 website:
She has the first sololine in Tochiotome25 no Theme:
Since the name "Tochiotome25" cames from a strawberry named Tochiotome and 25 is from its summer version "Natsuotome no. 25" which is the most delicious. T25 promotes Tochigi in every way - for example their next single Yu is coming in April and the name is probably shorten from Yukemuri. And ゆけむり is a red-white train in Tochigi if I understood correctly.
Some CM:
and lmao let's not mention Tochiotome25 latest single, Wagyu Fire!!: (Kurumi wasn't member anymore during this)
Tochiotome25 is Tochigi's local idol group that became famous in 2012 after they won U.M.U. Awards in Tokyo. AND WHAT BETTER: Tochiotome25 doesn't lipsync. Even though their lives are usually just short appearings on small stage in weekends.
Sorry I love Tochiotome25 so much and I once though how fun it would be to have a former Tochiotome25 member in Hello!Project and BAM. Kurumi.
I once found a flyer of an event and there was listed not only Tochiotome25 but also CoCoRo Gakuen (Chisaki Morito's former group) which is also a group from Tochigi so there is big change Kurumi and Chisaki have met.
https://www.youtube.com/watch?v=fnxvVZ9MoZY
Kurumi is easy to stop on the videos. She's the shortest and has side ponytail. She was also the main singer with Ai and Yayoi.
Please pay some attention for Tochiotome25, too! It's such an awesome group that needs more fans. I'm going to support Kurumi even though she's not my type of an idol. I just love Tochiotome25 so much (and feel free to ask me anything about them!). http://tochiotome25.com/en/