The new set of banging, muffled call of his name, and the sudden appearance of words in bright lettering on the door are more than enough to get Nie Huaisang's attention. He's about to turn his head towards the noise when those words appear, and he startles, stumbling back with a yelp, almost going down into the water on the floor but managing to catch himself on the wall.

Once he's got stable footing (though his heart is still pounding a mile a minute,) his head jerks over towards the banging and the noise, finding two faces peering at him from the window. He doesn't exactly recall whether a window was there before or not, but any mild concern over it is well and truly forgotten in favor of the two faces on the other side.

This time, instead of staring at Klaudia, he's staring at her companion and a very familiar face. Sorry, don't mind him, he's kind of frozen for the moment, wide-eyed.