Side-question: do we think Emil theoretically had a scholar specialization? (It would be tempting to say something fire-related, but I don't think that was the case. But hmm, I actually do have an idea for what it was SUPPOSED to be...)
The mystery of why all the Swedes met the ferry remains.
I like the idea that Siv and Torb came by boat, from some other location. Maybe they were picking up some small, specific supplies on the cheap, like the uniforms (or just part of them, like the boots?) or medicines. Or maps! With potential targets on them! That would be something they would be suited to, rather than Trond or Taru. (Incidentally, if boat travel to Denmark is possible, then why do people even take the murder train? I guess it's usually less murder-y, and a 9/10 danger rating doesn't mean a full-on giant attack?)
As for Emil, however, we know that he arrived by train, and from his confused behaviour it seems like he wasn't familiar with the town. So, er. Maybe he had been cleansing somewhere near there? I am sure that cleansers work all along the main railway lines.