Emma had a surprised expression on her face after Blood decided to not let her join the fight and left this place couple of meters away. Hmm... Ling was not mad at her, it was the thing he have to be sure of. Why? Because the skill that he was about to use has a problem as he can't control it perfectly, it would be better if Emma left the place right away before he could harm her.
Of course, Emma would misinterpret the situation as she had no idea what skills possessed this man had or how they worked. That's why he tried to explain in the fastest way that this woman could understand.
Meanwhile, she was not believing in Blood's explanations as she never heard someone can't control their power. Or to be exact, she understands some of the rankers can't control their power because of their tremendous strength. Not because they will lose their wits to the point you could kill someone without knowing.