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 fleet 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 influence 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 civilization 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.