Good sarcasm and black humour. However, background and non-leading characters are literally "the background": they have no expressions, no reactions, no movement, nothing, even in the most atrocious situations like sending whole families into slavery. A Roman could do more effort in getting rid of his Norwegianness for the sake of believability, i.e. at least changed his accent. Plus, there's no, totally no change of characters' behaviour during the entire series, no matter how horrific, varied, sad or good things happen to them: they all the time act in the same manner.