It's pretty simple when you play it, but think of it like an SRPG, where you can move around a grid-style battle arena and attack single or multiple targets. Whose turn it is is indicated by the list of portraits on the right - you can take your next turn quicker by using a move with a quick cooldown time, and it's later if you use one with a slow cooldown. Loads of RPGs have done this. Spells you begin casting and then cast them after they're done in a later turn - stronger ones take more time to cast.
The most interesting thing about it is the turn bonuses. See this pic. Kevin (green haired dude whose turn it is) has a 'death' icon next to his turn icon, which means any attack he does on this turn will be instant death to any enemies it hits. The yellow hearts recover a small amount of the HP of the person who moves on that turn, the two swords means that character gets to attack again, etc.
As for the other stuff on this screenshot, each character has EP (used for spells) and CP, which is used for regular special moves. You gradually gain CP every time you hit an enemy or take damage from one, and when it hits 100 that little red circle appears above the character's portrait. Click it and you can use an S-Craft, which is just basically a limit break. You can use these at any time without any regard to the turn order (your character will just immediately slot in after the character taking their turn at the time)
*You will get various other party members to support the four main. In combat, you will have an active party of four, but the party total is six.
So, four active and two support characters at a time out of a larger total? Because I'm pretty sure that despite seeing only four in gameplay so far the booklet showed off several other PC-looking characters whose names I can't recall right now.
*Sora no Kiseki characters will appear, but who they are is a secret.
Cool. One suspects Klose would be a reasonable bet considering.
As I've been saying to Floofy a lot, considering it's Crosbel I'd put pretty heavy odds on one of the Sora no Kiseki characters being Renne. As a former member of the Ouroboros she's clearly got more relevance in the story to come (you'd assume she knows where the 13th Workshop is, at least - though probably not where their main headquarters is) and considering Crosbel's where she's from and was staying between SC and 3rd, it seems extremely likely she'll at least appear if not join.
All the info we have sounds totally awesome though, I've got no reason so far to think this game isn't going to deliver. 2 months and a week!
Also, Aya Endou After hearing her do Akane in Ar Tonelico 3 she's pretty high up my list. Shame the voices are limited to random interjections and battle dialogue
That might have been for the protection of the buyers really. I think the 'white power of the Goddesses' Dulless spoke of was really the amazing bleach they used on their undies, rendering them so white they would blind any mortal who glimpsed them.