The Ventrue are those vampires that can trace their ancestry back to one of the Great Houses and thus possess a small hint of Necron blood. This is possible because before the Vigilant Declaration in 2276 AD there were no official laws regulating the reproduction of the Ventrue, meaning that there were some descendant lines from before then that were not kept pure. Since the declaration two and a half centuries ago those diluted bloodlines have become diluted further still, but nonetheless a trace of Necron remains.
Despite having nearly unlimited wealth and power to wield, the Great Houses of the Ventrue vie among themselves for greater status and influence. The Ruler of the Blood Imperium has always been a member of the Ventrue, the most notable from the Great House of Von Carstein.
In the highest seat of power sit the Von Carsteins. They are the direct descendants of the first emperor Asmodeus. As half-Necron, the Von Carsteins are regarded as demigods. They are a tiny minority of the total population of Ventrue and largely keep to themselves.