Arialla might have blocked something N1. Hitting a traitor might explain another if the kill is the recruitment method, though I'm not sure mafia would target Blood Fox with a kill. There are three single-kill nights, though, right? SK vest is probably more likely than two traitors, but I wouldn't rule anything out.
Either way, we might be overthinking this. If someone else comes forward and claims one of last night's kills, we can probably be confident that one of them is the SK. If they don't, we can probably assume Virothe is town and the SK is hiding.
I'm coming back round to Crissi as a possibility, but I'm still not sure about anything.
We have Crissi's country, but not her role, right? Same for you, Xan?
- - - Updated - - -
Mrh, not quite what I said. I'm still having difficulty believing that scum would target Graeham instead of leaving him for lynchbait.