if you remember old street fighter youll can use some weird moves :P
anyway for the keys (natsuki) :
, : punch (weak)
. : kick (med)
/ : shoot (strong)
\ : dhuran (child) (only when child bar is full or not red for nao's case)
when you use for example down, forward, \, you'll use dhuran load silver cartridge (thus freezing the opponent), for akane's case, you'll use her special (thus reducing the hime bar counter) which is harry's roar attack.
I don't know how to use mikoto's "child" and you can control julia when nao uses her child (including julia's web attack).
man I love this game, even better than senretsu (if they create better graphic, it make this game excellent)
The "animation" is very detailed, such as miroku can be dropped down, nao's claw attack and many more