Hearing the Phoenix Emperor's question, Weiss replied, "I'm not free since I'm spending my time with my girlfriend."
Weiss wasn't lying since he was indeed spending time with Alice. If he was truly free, then he'd be walking outside his house on the streets minding his own business.
When the Phoenix Emperor received Weiss' reply, he was stunned since he didn't expect Weiss to reply like that.
After all, the Phoenix Emperor had emphasized that it was urgent yet Weiss acted as if that wasn't his problem.
However, the Phoenix Emperor couldn't find faults with Weiss since Weiss was currently the strongest in Blue Star. Even he, the Phoenix Emperor, couldn't contact Weiss for unnecessary things.
And even if he contacted Weiss, he couldn't force Weiss to do things Weiss didn't want to do. So even if the Phoenix Emperor could contact Weiss, it was another problem to convince Weiss to deal with an emergency.