I think the same. But I still don’t know if Ryan knows everything and is planning something or if he really is in denial.
Thats what i was thinking! He was also the one who stabbed the intruder to death right after seeing his face which could possibly be because he knew that Cecila could use her powers to gain some information from him — i know some of you may say that “that’s impossible, the intruder was gonna kill christoph”. but what if, just what if that was just the point of view of Karis — what if intron is only using kyon as a distraction to keep everyone busy while behind the scenes is christoph secretly working as a spy for intro all this years...
I still think it was Cristoph and the solution was in the tea. thats why he told Kyon to prepare it and since he knew Lucaon would not suspect anything Kyon brought him it was easy to infect him. I also think Ryan knows and is in denial, but told Sihan to stop eating just in case.