When Emerys woke up, he wanted to leave before A-Xuan did, but he had a tight hold on him. Still, he felt reluctant to let go of him. He can't explain it, but since that meeting in his office, he feels this pull to him.
At first, when he followed him after the meeting he told himself, it was because he was keeping something from him, so he decided to go on the scavenging mission, but he knows it was never about that.
When he saw A-Xuan running to them when they were fighting zombies, he was stressed, when it never happened before. He is the most powerful user, so he's never been scared or worried, but for the first time yesterday, he was.
Because A-Xuan was there, and something could've happened to him, so he felt relief when he saw that he was just as powerful as he is. He also has three abilities, he just never said anything.