Neuvillette is the Iudex of Fontaine, and the leader of the Marechaussee Phantom. While Neuvillette upholds the rules of the court with utmost reverence, he is quite aloof when dealing with human emotions and often distances himself from the public eye. Despite his human appearance, he is actually the Dragon of Water—the Hydro Sovereign. He is notably perceptive. when interacting with Melusines, he is extremely friendly. Neuvillette is unfamiliar with human customs and feelings.