An unpredictable seventh progenitor who is very fond of Mikaela Hyakuya. Lacus is seemingly obedient as Ferid is a superior.
Currently a city guard working with Lacus Welt and René Simm. An arrogant but powerful young vampire. Lacus is concerned about Mika not drinking blood, and he is not sure what Mika's attitude problem is. He attempts conversation with Mika often, but Mika usually blows him off. He keeps to himself and answers very few questions, if any, when asked. Lacus says he does not care if Mika dies. Ferid Bathory's favorite servant and Krul Tepes's favorite pet.
Currently a city guard working with Mikaela Hyakuya and Lacus Welt. Lacus thinks of René like a brother as they have been together since they were boys, even though they don't show much affection.
The vampire queen of Japan and a third progenitor. She favors Mikaela Hyakuya, and she turned him into a vampire. Lacus wonders if she favors him because he knows Yūichirō Hyakuya.
Lacus killed his sister, and Yoichi witnessed the scene from under a bed.
Yoichi Saotome's elder sister. Lacus Welt kills her by drinking too much of her blood after the Apocalypse began.