Ryoko can form energy within her own hands.
Ryoko can summon demons with the gem on her left wrist. But in order for her to control them, she needs a gem on her right wrist.
Ryoko can release blasts of energy from her hands.
Ryoko can regenerate parts of her body that have been cut off.
Ryoko can walk through walls and things.
Ryoko can teleport.
Ryoko has a force field around herself
Ryoko can clone herself.
Ryoko can fly.
Ryoko can form a light saber in her hand.

Ryoko can shoot laser needles from her hair if she can't do anything else.