For years her manipulations of the North American territories were unwittingly carried out by the Tremere Marissa, the former Prince of Washington D.C. Later she sent her childe Marcus Vitel, masquerading as a Ventrue, to overthrow Marissa and claim the princedom. He ruled until 1999 when his secret was revealed and he was destroyed. Her influence in modern nights is unknown.
Libellus Sanguinis I states that [Lasombra] refused to Embrace women for reasons he would not elaborate on. Sybil's existence contradicts this claim. It is possible that the account presented by Libellus Sanguinis only mentions the knowledge of European Lasombra, who also note that their Antediluvian embarked on prolonged journeys around the world following Thera's eruption 3,500 years ago. Sybil might have been Embraced during these periods without the knowledge of the main body of the clan, and perhaps [Lasombra] chose to not repeat the "experiment" afterwards.