The lower level of Darkmeyer and all over Morytania during Temple Trekking.
A low-ranking vampyre.
Up to a certain point in the The Branches of Darkmeyer
quest, if you don't have the full Darkmeyer outfit on, these monsters will kick you out of Darkmeyer. After a certain point in the quest if you aren't wearing the full Darkmeyer outfit, these monsters will be aggressive to you.