Furina and Neuvillette.

Appearance: Furina wears a dark blue suit-like outfit over a white vest with a jabot, all decorated with multiple blue cut stone accessories that resemble water droplets at several places. A blue sash is laid over the white vest, tied into a bow and pinned with a large blue gem in the center that is later replaced with her Vision. Her cuffs are folded back, hemmed into brass-like pieces, revealing a deep blue frill ending her sleeves. She also wears a dark blue top hat tipped to the left of her head, the hat decorated with metal flourishes giving the hat a crown-like appearance, in addition to including her emblem on the top surface. Multiple other fabric ornaments decorate Furina's outfit, including blue and white pieces of cloth on her trailing behind her waist and hat. Her Ousia form has all the white colors in her dress changed into a dark-blue color. She wears a black glove on her right hand and a white one on her left. Furina wears short white pants appended with black bands wrapping her thigh. She wears dark heeled leather shoes, with her emblem emblazoned on the bottom of soles and white ruff-like collars that wrap around her ankles.

Furina's Arkhe forms cause changes in her design. In her Pneuma form, Furina has glowing twin strands of hair down her back. Her top and shorts are white, as well as minor changes to the frill of her coat and her hat. In Furina's Ousia form, she wears a dark blue vest, shorts, and etc. Her hair is shortened to the length of her bob cut alone, and she loses the glow at the tips of her blue streaks.

Personality: Flamboyant and imprudent,

Appearance: A black ribbon with a blue underside and gold ornamentation fastens his hair. Two ornate gold hairclips fasten his hair above his left ear, with one bearing a feather-like blue attachment. He wears a white shirt with ruffled cuffs, with a ruffled white jabot at his collar. The jabot fades to blue at its tails, is darker blue around the neck, and is fastened in the center by an ornate gold brooch with an iridescent teardrop set in the center and a dangling blue teardrop gem. He has black gloves with gold rivets at the knuckles on both hands. Over the shirt is a long, navy-blue jacket with indigo patterns and gold details, including fleur-de-lis shaped closures on the folded cuffs. The sides of his jacket fade to brighter teal. Attached to the jacket is a dark blue capelet with wide notched lapels in gold and blue, with gold details and teal designs. From the two front ends of this capelet dangle two gold ornaments such that it resembles the scale of the Court of Fontaine.

He wears navy-colored pants, over which are thigh-high black spats with golden details. His shoes are black with gold details and blue soles bearing the designs of the scales of Fontaine.

Personality: Serious and polite.

Flamboyant and imprudent, Furina lives for the thrill of the courtroom, often speaking in a manner peppered with bravado and drama. She is impatient and has a childlike temper, and she will occasionally make judgments that she doesn't mean, which Neuvillette frequently has to control while conducting a trial to avoid complications. While she enjoys being in the spotlight, she only does so when it is focused at her positively, breaking down in complete shambles should something go out of plan and will try to save face at the first possible opportunity. It is later revealed that Furina was not the true Hydro Archon. Focalors, the successor of Egeria, had separated her divinity from her body and spirit; Furina was the Archon's body and spirit but had no powers. Focalors used Furina as a way to deceive the Heavenly Principles in order to prevent the result of the prophecy regarding Fontaine from becoming a permanent reality. Furina was tasked with maintaining the guise of an Archon and cursed by Focalors so that she could not die nor pursue her own happiness so long as Focalors lived. As a new "human," she had difficulty taking the role but eventually mastered it. Aware of the prophecy that would doom Fontaine, Furina assumed the role of Hydro Archon for 500 years; while she was successful in this task, it wore her down mentally so that she suffered from severe self-esteem issues and paranoia, as shown when the Traveler convinced the court audience that she was a fraud in her trial. Despite being undying due to being cursed by Focalors, Furina remained fearful of situations that seemed deadly, as she pleaded the Knave to not kill her during an attack for the Hydro Gnosis, and was hesitant in dipping her hand into Primordial Seawater to prove whether she is the Hydro Archon during a trial. As a result, she suffers from post-traumatic stress upon seeing rising waters or the Knave being mentioned to her.

In accordance to his role as the Chief Justice, Neuvillette takes the court and trials very seriously, handing out verdicts with impartiality. 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 as per protocol.

Due to his position and ties to the Hydro Archon, he is popular among Fontaine's people as a symbol of justice and honor. As a member of the Seven Sovereigns, Neuvillette is unfamiliar with human customs and feelings, using the court to help him process and understand them. He rarely spends his time out in public, as he does not enjoy unwanted attention, and in the few times he speaks to humans, he appears to be aloof, though honest in his words. However, when interacting with Melusines, he is extremely friendly, seen as the ideal father by them; likewise, he is fiercely protective of them, considering them the pride of Fontaine and investigating matters himself should he hear of a Melusine being bullied or threatened. This stems from his failure to protect his friend and subordinate, Carole, when she was driven to death due to Fontainian's prejudice, and Neuvillette being forced to sentence his other friend, Vautrin, for carrying out a revenge killing for Carole, he had since resolved to prevent such tragedy from happening ever again.

When he was initially reincarnated, Neuvillette was left with many questions about himself, leading to him accepting a position as the Iudex. His time overseeing trials led him to experience a plethora of human experiences and emotions, which was secretly prepared by Focalors in the hopes that his newfound perception would save the people of Fontaine from a looming prophecy that would exterminate them.