Churu let Kei state whatever he wanted to say in silence. On the other hand, Churu cursed him inwardly the longer they were together. The longer they share this afternoon tea, the more Churu realized that Kei was a complicated man.
One minute he was complimenting Tora and the next thing, he sounded as if he was criticizing her decisions; including the fact that she adopted a child. Overall, one thing that Churu understood was that if it wasn't for her, Tora would remain untouchable.
Thus, her existence was Tora's weakness. Coming in her life, it put Tora in a tough situation. Obviously, the fake emperor made sure that she would feel like that as it was the truth. Churu knew that as well because she, being Tora's adopted daughter, was the downside of the fearsome general.