Haoran looked very reluctant to let Emma go into the elevator to get to the top floor alone, but he knew that Emma needed to talk to the Akkadian people without him. The girl must be able to determine what decisions she must make without his influence. Then, once she knew what she wanted, they both could talk about it between the two of them.
Haoran already heard from Therius that his presence was not wanted and they did not want to take him along with Emma to Akkadia. Emma did not know that Therius had spoken to Haoran and how her husband understood the tough situation she was in.
Haoran, on the other hand, knew Emma was deliberately hiding that information from him because she wanted to spare him the bad news.
However, he would not discuss it at all and called out on her lies. He would let Emma think and decide whether she would share everything with Haoran or not. He believed she eventually would do so.