An assassin with a painful past, Mireille is very good at hiding her emotions. Based in Paris, France, her operations have her traveling all over the world (even to the humble island country of Taiwan). She was born in Corsica, France, the island where Napoleon Bonaparte was born.

A top-notch assassin, she still has some problems handling some tough, superior assassins. Intelligent, analytical, and seemingly cold without feelings, there's perhaps a fire burning with her that she never admits or denies. Her signature outfit is a dark red, almost burgundy, sleeveless blouse, a thin black belt with a silver buckle, and a short black skirt. People who have seen her in her "work uniform" are usually dead.

She and her partner, Kirika, are best known as "Noir".