Marie (マリィ Marī) is a mysterious girl who appears on Ren's dreams just after visiting a sword exhibition with Kasumi and seeing a guillotine. She forms contract with him in order to exhibit his potential and powers, which was shown as the LDO entered the city and chose Ren as their potential enemy. She transforms as a weapon to be used by Ren in his battles. Her other name was "Margueritte Breuil".