They are animal-to-humanoid shape-shifters. Contrary to belief, they cannot pass on their 'curse' through biting their victims. On Kudar™ they were seen as the worker caste. Upon their arrival on Earth, it was discovered that their shape-shifting powers were affected by Earth's lunar phases and that the Earth metal, silver, was lethal to them.
Although they would never have sided with Vampires on Kudar™, they are now divided amongst themselves just as the Vampires are and they now fall into one of the newly formed factions. The first wishes to remain underground - blending into human civilization. The second faction despises their lack of power so they eagerly rise up in revolution alongside Ja’Laar™ and his cronies when they return.