Marquis Machina is a Vampire of the Crimson Moon from Jun Mochizuki'sThe Case Study of Vanitas and the head of the the Machina Marquisate. Machina organized a Bal Masque at his home in Altus, inviting the likes of Lord Ruthven and two members of the De Sade Family, Veronica and Dominique. After Vanitas makes his existence as a human known to all the Vampires at the Bal Masque, including his relation to Vanitas of the Blue Moon, Machina refuses to take action against Vanitas. prompting a hunt for the human, Vanitas, by Machina's guests. Shortly thereafter, a song is played in the ballroom which begins turning the Vampires in attendance into Curse-Bearers. In the ensuing chaos, Machina followed close behind Veronica as she left the ballroom.