Cure-Noir Tresor is one of the three ancient gods that support the sky and earth - "the Ice Witch". Although she appears to have a feline form - much like a Maine Coon cat (but with wings) - she is also Milieu Rouge Tresor's elder sister. She does not like Lewin Randit, and consideres him a threat to the three witches, once his magical ability is revealed.
Cure-Noir Tresor takes on the appearance of a winged cat. According to Midorikawa, she's based off the Maine Coon breed of cat (which are very huge and very fluffy). Her fur is not the same color as most winged cats, though, because the late Scarlet Sorcerer cursed her fur white, instead of black. She has golden amver colored eyes.