Xenk hates Satoru so bad and yet Satoru thinks Xenk is hilarious in his stoic, straight-laced, rules-following kind of way. Satoru 100% goes out of his way just to rile Xenk up and make him give lectures about how laws and and governance are good actually

I'm probably putting Satoru at just barely a mature vampire at 51 years (though there's nothing mature about him), so if that timeline fits with Xenk, having them be former teacher and student would be absolutely hysterical lmao. Satoru was that student who never studied and never paid attention but breezed through everything, much to everyone's annoyance