Neruys was a humanoid demon, he had a large mass of tendrils coming from the back of his head, blank eyes and a bird like beak. Across his body were smaller blackened tendrils.
Neruys was one of the demons who watched as Magistrum tried Jeanne D'Arc for conspiring with demons. After she had been tied up Magistrum instructs Neruys to strip her naked for burning. But he is interrupted by the arrival of Akira Fudo who he is then killed by.