Aiden had just had this thought when he realized his judgment was too hasty.
The Blood Moon Cult following the Harvest Mother Cult should have at least some grasp of the latter's movements, not to be totally ignorant.
Nos's behavior pattern also seemed a bit contradictory if he was there to investigate clues, he should have concealed his whereabouts as much as possible.
Behaviors like feasting on human blood would surely draw the attention of the Heresy Inquisition if prolonged. Doing such things in an autonomous state with an unusually active inquisitorial apparatus, and in the city district no less...
Just sucking blood to satisfy one's own desires, no matter how confident one is, would typically require heading to the outskirts of the city, right?
"Hey, are you capturing people to suck their blood on the Cult's orders or is this on your own initiative?" Aiden asked.