Millicent Rue
Millicent Rue, a Lasombra blood trader and former Sabbat, was embraced in her 70s. She is Sire of the Courier from Vampire: The Masquerade - Night Road, if they are Lasombra.
Millicent (like all Sabbat) believes that Humanity is a lie and the Kindred shouldn't try to hold onto it, instead viewing the paths of enlightenment as the best way to control the Beast.
She'll lament to a Courier who's her childe that selling blood for the Camarilla is petty and meaningless compared to her nights as the aristocracy of the Sword of Caine, fighting to stop the Antediluvians and unlocking the dark paths of enlightenment. As part of the Sabbat, she regularly engaged in mass embraces, siring random people, hitting them in the head to scramble their memories, and sending them off to die. However, the rare childe who survived this process, she kept and trained.