The Night Vigilance Division, also known as the NVD, is a sector of the SVD, except they work at night rather than in the day. The NVD sleeps during the day, while the non-voyant SVD officers worked.
The NVD are clairvoyants in uniform who work to track down and prosecute other clairvoyants. If a clairvoyant turns him- or herself in, they have the choice to become NVD for thirty years before being euthanized. This allowed them thirty years of a comfortable life, but in turn they have to sacrifice their life and morals, as they turned on their own kind.