As if life wasn't hard enough for Illyan! Though this might explain ImpSec HQ being quite so granitely forbidding: it's to keep the magic out so that they can run their computers in peace.

But oh yes, of course magical ability is particularly widespread among the purebloods Vor. And there are lots of Issues with who's in control, the magic-wielding Vor or the proles with computers and nerve disruptors...

This is also making me think that maybe Ivan is a Squib ;-).

Gregor has to be a Ravenclaw. 'Let's see what happens' is a very Ravenclaw sort of motto.