Neuvillette is the leader of the Marechaussee Phantom and the Iudex of Fontaine. He upholds the court's rules and takes trials seriously. He is impartial and perceptive, utilizing a machine to make the final decision. Despite being popular, he is aloof and distant but values justice and honor. Neuvillette opposes Heavenly Principles and is an avid water taster. He dislikes deep-fried food, grilled food with no sauce, and Charcoal-Baked Ajilenakh Cakes.