A simple 'thanks' would suffice. Thank you, Klaus, for dispatching the bad men. They murdered my neighbor. [ sorry, though? you were in there before him which meant the neighbor could've been saved. ]

Who are they, anyway? Does this type of thing happen often around here? It's very post World War I Germany. [ is he fond of that? isn't he? she probably can't tell. but, seeing that he's just left his own dimension, dealing with both an all consuming evil and a group of religious, bigoted zealots that, yes, had originated in germany, it's probably not a good thing. ]