Vampires
Lucien Castle
The Beast
A servant of the de Martel household in the 11th century, turned by Klaus and then compelled by Elijah to believe he was Klaus — a decoy while the family hid from Mikael, and then left behind. Nine hundred years of being underestimated later, he engineers the prophecy that will destroy the family, refines Esther's original magic into a serum, and makes himself stronger than the Originals — a Beast whose bite kills them.
Details
- His serum is later used on Marcel, which permanently changes what is possible in the franchise.
- He heads Klaus's sireline, which contains most of the vampires in the world.