Monet St. Croix is the sister of Marius, Claudette, and Nicole St. Croix. When her brother Marius, who would later become the mutant Emplate, first manifests his powers, the conceited Monet often verbally abused him. An enraged Emplate transforms her body into a hardened, spiked, red state and left her mute. He then tells her to "consider this your penance". Claudette, realizing how dangerous their brother is becoming, banishes him to his own pocket dimension, but he convinces Monet to accompany him, as only he can restore her true form. Nicole and Claudette, knowing Monet was their parents' favorite, decide to merge into one body with the appearance of Monet ("see" Monet-twins).