Herd
Herd is the deliberately derogatory term among Cainites for mortals who readily let the character (and vampires she allows to join in) drink their blood. Motives for this submission range widely, from believers who are convinced that the character is a dark angel granted divine authority over the to ambitious schemers who regard the humiliation and fatigue as the price of admission to the vampire's favor for negotiation and power over rivals. It's hard to give one's herd detailed orders: They're addicts to the experience of feeding, not much use as allies or contacts (unless you also buy those Backgrounds to refer to the same individuals). They don't automatically share all their territory and goods, either. Those benefits require separate purchases of Domain and Resources.
Some common factor ties the herd together, whether it's shared membership in a monastery or chivalric order, being members of one or a few extended families, residence among a particular street given over to the practitioners of one trade or something else. Work the details out with your Storyteller, since threats to and the fortunes of your herd are great sources for stories once play begins.
Each level of Herd rating provides an automatic blood point per night your character chooses to feed, in addition to the vagaries of regular hunting.
1): 3-5 reliable vessels.
2): 7-10 reliable vessels.
3): 15-25 reliable vessels.
4): 30-50 reliable vessels.
5): 75-100 reliable vessels.