Ok i think i understand... alt universe where reynir leaves home early?
Actually, alt-universe where Reynir's sister runs a training facility on the premises of a cat training facility - she's sent Tuuri & Onni from her team to retrieve Reynir when his power manifests and he literally runs away from home, ending up on the ship operating as Iceland's offshore quarantine/entry processing facility; they bring him back to their base in Norway. In this AU, some non-immune persons with magical ability can develop superpowers.
I thought it would be fun to populate this AU with some of our characters, even though the vast majority of SSSSona are immune.
I've already exposed Reynir's eldest brother as a fraud who's actually a janitor and not a troll hunter. I've already tipped that Sigrun is there on the expedition but not leading it, and the cleanser on the expedition is female, because AU. Stay tuned for more revelations.