Rarely seen at the Bastion Serpentis, Van Vuygens represents the Ordo Xenos in the conclave. He is a quietly spoken man who is more of a scholar than a warrior and, though he can certainly look after himself if required, he sees more value in dissecting and studying xenos than exterminating them. Slender, bespectacled and dressed in an archivist’s robes, Van Vuygens does not cut as imposing a figure as some of the cabal’s more dramatic characters, but he has the intellect and strength of will to delve into the mindset of the xenos and still retain his humanity. He leaves the human and Daemonic threats to the other Inquisitors, focusing instead on helping provide the Imperium with its chief weapon against the alien: an understanding of what the aliens want and what they will do to get it. Though Van Vuygens seeks knowledge about aliens, he does not trust them and would never fraternize with them. He has not studied a single alien species that does not pose some threat towards the human race.
A disciple of the legendary Inquisitor Kryptmann himself, Van Vuygens is in the Calixis Sector to watch for the signs of a Tyranid hive feet invasion from beyond the edge of charted space. Kryptmann has theorised that the earlier Tyranid invasions of Imperial space have been testing the Imperium’s defences and that the next invasion will come from an unexpected quarter. Van Vuygens has seen nothing that proves that a Tyranid invasion is impending but there are certainly plenty of other signs of alien infuence among the worlds of the Calixis Sector, from ancient cyclopean ruins to disturbing similarities between the mythological cycles of primitive worlds. Van Vuygens is currently piecing together a picture of the alien civilisation that once inhabited the very edge of the Calixis Sector’s space and he does not like what he sees. He, naturally, subscribes to the view that the Tyrant Star is a matter of xenos origin and has grave fears that it is linked with the dreaded Tyranids.