Well, my interest has finally been peaked. (I've liked Kotoe's design and voice from the beginning, but honestly I forgot this also was an option and just... assumed it'd be a CeVIO AI project, haha. Now I'm really going to be paying much closer attention.)
So, the confirmed synth now is A.I.VOICE, and the plan they've chosen is the A.I.VOICE Junior plan that lets third parties raise a smaller amount of money to still make their product. Full features can be expanded with via crowdfunding stretch goals, but the basic minimum here is just to get the base voice funded.
The first image is just a brief description of Tange Kotoe's character: a white-haired white fox who uses "maro" as a pronoun, which according to wikipedia is "used as a universal first-person pronoun in ancient times," and whose dialect* is "noja." (Not an actual dialect. Just means they end their sentences with ~じゃ or ~のじゃ is what I got from a brief google search. It's a character trope.)
Their backstory is essentially that they used to be a popular god, but while they were sleeping, their faith died out and their shrine destroyed, which led to them losing their powers. They eventually met a human named "Utsuwa-chan" and with her help, became a Vtuber. The reason for becoming a Vtuber is to raise enough money to rebuild their shrine and presumably regain their powers.
Also mentioned in the first image is their official illustrator, かれい / Karei, aka
@flat_fish_ on twitter. They're a very popular illustrator and have done many VOICEROID illustrations and standing images in the past. They also are the artist for Kotoe's Vtuber model - you've seen their art just by looking at this thread.
On the second image, a new logo saying "Tange Kotoe" is shown, as well as a black silhouette. The word "temporary name" (仮称) is written next to it for some reason. Guess it'll change?
The description basically says that this is a derivative of Vtuber Tange Kotoe that was born to spread themselves (fame, influence, etc.). Their outfit is different from the original. The tone and personality of this one are based off the original Tange Kotoe, but as they spend more time with "you" they will grow into their own person.
Then it just repeats the same info about Karei the illustrator, but with an additional note at the bottom saying that everything on this image is subject to change as this is a product in development.
The third image is just a brief overview of A.I.VOICE (Junior) and the company behind it. Nothing that isn't already in the
general dedicated thread for it.
Finally, the last image is the whole Tange Kotoe x AI Inc. promo image of sorts. New info here is that the crowdfunding campaign will take place in July, so next month.
As for the actual livestream that was done today, it's here:
My internet is really bad right now and won't load it in any sort of listenable quality, but I doubt it has anything not mentioned in the tweet thread linked. Still, I'll go over it later when I actually can watch it and update if there is new info.