Constantine (コンスタンティン, Konsutantin?) is a member of a campus conspiracy theory club that is well versed in legends and parables of the University of Munich. Translating a poem by one of the university's founders, they anticipate the arrival of an apocalyptic figure named "Thursday's Boy" (derived from "Thor", or "thunder god"), who is foreseen to precipitate a destructive inferno in which books will be burned and, from thence, a period of worldwide despair will commence, which will occur in the penultimate leap year before the onset of the twenty-first century (i.e. 1996), foreshadowing the ensuing events to come.
Later, Karl Neuman pays him to dance with Lotte Frank at a party in his place. When he insists while in an alcohol-induced stupor and verges on harassment, Lotte's newfound friend Nina Fortner promptly subdues him using techniques from Aikido.