Just read your post about Rikyako... my heart hurts hearing about all the past struggles of the love live seiyuu :( do you have any sources for them though?
Ah, whoops…I’m in this little bubble of seiyuu fans, so I tend to forget that not everyone knows these things.
Well, at the very least I thought the thing about Kussun working at a maid café would be well-known. It’s even on her Love Live! Wikia page - she was a part-timer at the Akihabara cafe “Cafe la vie en rose” prior to her debut as Nozomi.
The stuff about Pile is also kinda general knowledge…? At least, I always assumed that was part of the reason why so many people liked her (the giving-up-music thing basically made her a real life Maki). Her past debuts show up on her English Wikipedia page. Pile even wrote a secret message to Maki in her song “P.S. Arigatou” by bolding certain characters in the lyric booklet to spell out: “Maki-chan, I’m finally able to say it… Thank you for everything up
until now. I was able to make it this far because you were here. Please
gently watch over me. P.S. I truly thank you.”
As for King’s single, you can find it here, along with previews for the tracks! There’s also the video promo for it on the official Victor Entertainment YouTube channel, which you can see here (Note: the video’s blocked in the US - and possibly a few other countries - so you might need a VPN to watch the vid). The mini-album is called “Bonjou Cinderella no Shiruke no Aru Onegai”, and was released in 2012.
Other stories about the seiyuu working in part-time jobs and such are mainly from their past blog entries and social media posts (e.g. Twitter, Instagram, Facebook), or conversations from interviews and radio programs…which I’m kinda too lazy to look up at the moment. Sorry, it’s just kind of a lot to sift through to find the exact source. _(:3 」∠)_
Observations about the seiyuu not finding any work or not having major successes in general are pretty much drawn from the fact that when the cast was announced, everyone went, “Who?”
For example, in the case of µ’s, about half of them were well-known in the seiyuu world: Mimorin, Soramaru, Ucchi, and Jolno. Even for the recent PDP seiyuu announcement, some seiyuu fans recognized a couple of the girls at the TGS event. In the case of Aqours, while
some of them did have previous experience, LLS was pretty much
the major breakout role for everyone in terms of voice acting. As a seiyuu fan myself, the only person I recognized on sight when the cast was announced was Anchan - but that was due to her role as Ino in the Naruto stage play, rather than seiyuu work.
Basically, you can go to their Wiki pages or agency profiles and figure out kind of work they did in the past. If you hang around message boards around the ‘net and go through the backlog of their blogs and stuff, you can find some interesting stories as well. For example, back in 2015 Shukashuu and Rikyako were pretty active about answering fan questions on Twitter. That’s actually how people learned about Rikyako living in LA. When a fan asked what country she liked, Rikyako chose America for the memories she made there and explained how she used to live in LA.
tl;dr: A lot of the information out there is “common knowledge” by now, but if you look hard enough, you can definitely find a source. For the most part, info is available on Wikipedia, agency profiles, and past social media posts.