Here is Pirouette, a psychopathic assassin. She has plasmium (liquid metal that can be reshaped mentally) gauntlets and greaves. She combines these with her athletic prowess and ballet skills to become a lethal dancer, whose hands and feet bring death.
She was once part of Kid Titan’s group of young villains, the Hellions, which came into contact with the Cadets many times. She and Titan were involved at one point. Ever since he came back, she has tried to seduce him back into villainy, but so far he has remained a neutral party.