Here's a little review to save your time and phone internet package.
The game is a live 2D. No 3D assets at all. If you're familiar with graphics like FATE then this game is probably for you.
You can carry 4 characters at the same time.
Battles are Turn-based with an Auto feature. To be more detailed there's elements system and what seems to be a weapon type. So its like a dual element system.
That's it.
Mentioned games