I don’t think they specified when on Thursday, sorry.
Sadly, yesterday’s ‘announcement’ turned out to be a dud where literally nothing of note was forthcoming.
Here’s hoping Thursday’s info is good. I may try to translate Ruby’s movelist to kill some time.
Edit: Here’s what I came up with. So, Ruby’s movelist is kind of a haze of “My head hurts and I’m not terribly awake yet”, but I got most of it!
She has four smart combos.
Her Reversal Action is… Some kind of ‘slice’, as in the action one might make with a bladed weapon. Sorry, can’t read it clearly.
Getting into her Specials (which they call "Skill"s in the green box)…
Rifle Shot (or Rifle Shoot, both are correct translations) is QCF + Square.
QCF + Triangle is… best guess Support Shot/Support Shoot (the accent marks on the first word are extremely tiny and it’s throwing off my reading). Edit 2: I think this means ‘support’ as in the act of supporting one’s rifle’s weight to aim better before firing, not as in an ‘Assist’ attack since Assists are universal engine features in this game.
QCB + any attack is Gun Blast, and the movelist notes it has follow-up interactions with another move whose name I can’t read; you press the button again to get the extra attack. It has a special condition or limitation involving ‘two’, but two of what I don’t know. This movelist is really blurry, my Japanese sucks, and my vision isn’t so great these days.)
QCF+Attack in the air gets some kind of ‘Blast’ named attack, I’m assuming this is a rifle shot of some kind but I cannot translate the first word accurately; I wind up at too many possibilities to be useful. This move also has an EX version done by QCF + Circle in the air (kinda like Under Night characters in this regard, it looks like).
Her other EX Special, QCF + Circle on the ground, is Guillotine (most likely translation. Other possibilities exist but make no sense).
Petal Boost is QCF + two attacks.
Petal Dance is QCB + two attacks.
I am absolutely confident in those translations; it’s definitely Petal Boost and Petal Dance. Petal Boost is probably her ‘turn into a swirl of red, dash through the target’ attack.
Petal Boost also gains some benefits when your resonance boost is active, but I can’t tell what said improvements would be.