Roll
This is the shortest character in the game. Almost everything standing flies over her head. Be careful when facing someone who uses Roll since they can take advantage of the shortness. If you are using her, take advantage. She can't bust out the Buster like Rock(Mega Man) can though. Her Roll Buster is motion based.
Special Attacks
Roll Buster - QCF+P
Exploding Bouquet - QCB+P
Switch Special Weapon - QCB+K (WK = Rockball. MK = Tornado Hold. FK = Leaf Shield.)
Special Weapon Use - QCF+K
Super Attacks
Hyper Roll - QCF+2P
Rush Drill - QCF+2K
Beat Plane - QCB+2K
Combos
D+WK, D+MK, D+FK, QCF+K
This is a basic ground combo. Make sure that the special weapon is Tornado Hold or else the combo won't work, it'll just setup other stuff.
QCF+K, WK, F,F, WK, FK, U+WP, WK, MP, MK, QCF+P
This is a set up into a launcher that seems to work well. Kick a Rockball then dash in with the rest of the combo. After you finish the air combo, start dropping Exploding Bouquets as much as you can.