Tbh...Not Surprised at all

Because when you think about it, and if you've been observant, you can obviously tell that Christoph was the culprit. After all, think about it, many of the servants, whether they are Lucaon's servant or not, dislike Lucaon, to the point they don't even want eye contact with him, as seen by Karis and Cecilia's personal servant, who aren't even Lucaon's servants themselves. And remember Christoph was the one that gave Kyon advice about having a meal w/Lucaon, which in my opinion was strange because Christoph barely talks about anything personal with any of the characters, or takes initiative to encourage anybody because, as seen just as early on he has always stayed professional and private with the characters, even with Ryan and Karis. Plus about the sleeping scenes, It's also another obvious moment, because he knows he's guilty, especially towards Ryan, cuz if you think about it, I don't even think Christoph would feel that "afraid" towards other nobles, but Ryan he would, because It's possible he loves Ryan or has some sort of high feelings for him, but at the same time can't stop this urge of trying to get revenge on nobles or some sort of acknowledgement from his half-brother or Intron itself