The Chief Justice of Fontaine, known as the Iudex, is renowned for his unassailable impartiality. In accordance to his role, Neuvillette takes the court and trials very seriously, handing out verdicts with impartiality. He is notably perceptive and is able to deduce the additional details from the evidence provided to him during a trial. Neuvillette is unfamiliar with human customs and feelings, using the court to help him process and understand them.