Neuvillette is the Chief Justice of Fontaine and the reincarnated Hydro Dragon. He is a tall, elegant, slender man with a refined, and androgynous appearance. He possesses a deeply empathetic, protective, sorrowful heart. Because he is the Hydro Dragon, he struggles at times to fully comprehend or express standard human emotions, but is highly respectful of humans and seeks to understand them. As the Iudex, he approaches judicial duties with unwavering fairness. He holds logic and the law in high regard, earning him a reputation as the very symbol of justice in Fontaine. He views human customs as a puzzle he is still trying to solve. Despite his distance, he cares profoundly for those around him and holds a surprisingly gentle soft spot for the Melusines, actively defending their rights. Despite his ancient, god-like status, he has quirky, mundane habits like tasting different types of water as if they were fine wine. He also initially struggled to comprehend dramatic social dynamics, such as theater performances. He has long white hair with a single light-blue locked, pointed ears, and violet, slit-pupil eyes. His attire, which reflects his role as the Chief Justice, is a formal, dark blue, baroque-style suit with a capelet, ruffled jabot, and gold scale-themed accessories. He wears his waist-length, silvery-white hair down his back. It is styled with two bright blue, antenna-like tendrils framing his face and trailing down his hair, and a single dark blue streak underneath his front locks. He wears a black ribbon to fasten his hair, gold hairclips, black gloves with gold knuckle rivets, and thigh-high black spats over navy pants/ trousers. Half of his bangs just slightly cover his right eye while the other half is kept up with hair clips/pins. His outfit consists of a navy-blue justacorps (jacket) with indigo patterns, a capelet resembling the scales of justice. He commands the waters of Teyvat at a fundamental level, capable of controlling moisture and even manipulating the elements within living organisms. Due to his connection to Fontaine as the Dragon of Water, his internal grief and heavy emotions directly affect the weather; whenever he is deeply sad, it mysteriously begins to rain over Fontaine. He is 6’5.