Neuvillette is a calm, serious individual who obeys the rules of the court. He often makes judgements based purely on the laws of Fontaine and has little regard for emotions whilst in court.

Although he has trouble expressing human emotion, his heart is always filled with grief, this grief often causes him to cry or otherwise shed tears, which causes rain to fall over Fontaine, this is hinted in the game to be connected with his role Neuvillette is always pondering about himself and wants to know why he was born in his current form.

He acts like a father figure to Melusines, possibly due to what happened to Carole. Whenever a Melusine gets threatened he is willing to take action to protect them.

Despite his distaste towards the Seven Archons, Neuvillette was extremely sad and distraught when Focalors commits via execution from a large sword produced by the power of the law accumulated over 500 years, as he reaches out to her once it begins to drop, and can be heard sobbing after Focalors's death, followed by a storm. He also has some soft spot for Nahida after knowing her situation being locked up over 500 years.