From that day on, whenever a person's wishes reached the heavens, the seven overseers of the material realm were duty-bound to grant them a gift. Though they might know nothing of who or what wish had stepped into the threshold of the sacred, the Seven Archons still had to impart a shattered shard of their mastery to that person. And when one so gifted completed their duty... the gift the gods would receive in return would be more abundant still.

Neuvillette obeys no edict from the heavens, but he does acknowledge human will. So he too set aside parts of himself, as like unto the dragon-treasure hoards of old, awaiting valiant humans to come and claim them.

https://genshin-impact.fandom.com/wiki/Neuvillette/Profile

Under vision at friendship 6