Madame Le Rouge, originally known as Katria Celestine, is a a female human who formerly worked with the French special forces. After she was injected with the xenobites deposited in Earth's atmosphere during Brainiac's invasion, she was transformed into a cold blooded killer and an extremely skilled soldier and combatant.
She wears an eyepatch over her right eye, she has pink hair, topped with a red beret. She wears a black tank top along with black tights and a pair of knee-high boots. On her tank top, she has a red star that symbolizes revolution. After her transformation, she became a supervillain working for the Joker. She named herself "Madame Le Rouge".