For just a moment, Klaudia's expression resembles her companion's as she gives Nie Huaisang the most unimpressed look. That doesn't sound like much of a reason--at least not for the level of familiarity that these two seem to have. It would be an entirely different matter to shout someone's name and wave your arms for their attention if you were closely associated with them--like a good friend (or a crewmate), for example. But Lan Wangji looks more disinterested than Klaudia has ever seen him, so she can't imagine that's the case.

At the very least, he hasn't reprimanded her yet; and this stranger seems to have all the durability of a wet paper bag, so she's feeling a little more bold. "It's how we were all welcomed here. Did you think you were special? If you have a complaint, you should take it up with management." What management? She has no idea, but that's not really her problem. "You're not someone that either of us were waiting for, so how familiar can you be?"