Guillaume, a demented scientist and genius who was banished from his home-land because of his sick experiments. He is a vampire with power to control fire and the stereotypical mad scientist who thinks vampires are superior to humans and they are not made for defeat. He kidnapped Caroline and uses his vampire henchmen to fight the vampire hunters. During the boss battle with him, he shapeshifts into a massive bat and after his defeat, he returns to his human form, and not bearing to accept defeat, he commits suicide by jumping from a cliff while laughing maniacally. He has a strained relationship with fellow vampire Raoul, evident when Diane warned Guillaume's death and Raoul told her that he got what he deserved.