Nais Atropos Mnemosyne de Mauvaisefoi Nais is the fourth and youngest daughter of Ambrose de Mauvaisefoi and Catarina Guerrero, and the step-daughter of Euporie Blackrose. Her older sisters are Ambrosia, Circe, and Amphitrite and the younger sister to Draco.
Nais is the half-sister to Persephone, Galatea, Asterion, Theseus, Icarus, twins Melanie and Phoebe, and Sterope. Nais is the half-sister to her father's bastards Antonia, Sebastian, Silas, Rein, Trinity, Seth, and Adonis.
Her first name is Nais means "river nymph", derived from Greek naiein "to flow".
Atropos means "inevitable, inflexible" in Greek, derived from the negative prefix α (a) combined with τροπος (tropos) "direction, manner, fashion". Atropos was one of the three Fates or Μοιραι (Moirai) in Greek mythology. When her sister Lachesis decided that a person's life was at an end, Atropos would choose the manner of death and cut the person's life thread.
Mnemosyne means "remembrance" in Greek. In Greek mythology Mnemosyne was a Titan goddess of memory. She was the mother by Zeus of the nine Muses.
Her surname is Mauvaisefoi means 'bad faith' in French.