Neuvillette, Fontaine's Iudex and Hydro Sovereign, is aloof with human emotions but upholds court rules strictly. He's known for giving impartial verdicts using the Oratrice Mecanique d'Analyse Cardinale. As a symbol of justice, he's popular in Fontaine. He's distant with humans, except for Melusines, whom he's friendly and protective of. Because of his status as the Hydro Dragon, it rains in Fontaine when he cries or is sad.