lol did Kai get dumped by Aichi?
Anyway I guess this is the main "cast" going forward as of S3.
Guess they'll save Kai/Ren (maybe Leon) as "strong" characters to beat down Aichi and co with early on (so they have to level up yo) and than get beat by the big bad to show how "strong" they are.
Anyway the new "it" things for this season is Dual Clans and Ride Breaks.
Dual Clans being Royal/Gold Paladins, Kagero/Narukami and I think Oracle Think Tank/Angel Feather.
Ride Break, only example shown so far, but you get the idea -
Auto LB(4): When another <<Narukami>> unit rides on this, you can select 1 of your opponent's Rearguard on the front row, retire it, select 1 of your Vanguard, during this turn, Power +10,000.