In accordance to his role as the Chief Justice, Neuvillette takes the court and trials very seriously, having no bias to his judgement. He is notably perceptive, being able to hear Paimon's whispers and is able to deduce the additional details from the evidence provided to him during a trial. He utilizes the Oratrice Mecanique d'Analyse Cardinale to make the final decision, honoring its request regardless of his own feelings on the matter per protocol. Fatherly when with Melusines and children.