Balthasar von Neumann, also known as Basilisk, is a Methuselah whose father was apparently a human. Balthasar lives in a castle together with his brothers. He is known to hate unnecessary violence, possessing an artistic nature and is a great tactician. Balthasar has the ability to generate a petrifying venom from his palm which can crystallize the living target. He can also petrify his own bodily fluids and fire them in needle-like projectiles. Balthasar is one of the few people Isaak respects, however, when Batlhasar conspires with Helga, Isaak kills them both.