Xue Ren surely isn't common individual.
He popped out of nowhere and took the leader with himself to the other side of the city! He had done it so nicely and quickly that no one truly could find them based on the trails. That's why, the duo was both looking at each other while trying to probe out each other's strength.
The leader wasn't that weak himself.
"This city is going to be mine."
"I see. So, you are the one behind the siblings recent power up."
"Indeed."
Of course, if the leader was much stronger than Xue Ren, then he would probe more into his background. However, he is one of the city leaders and his power is far less than Milliane. Asking such question while not being able to properly gauge Xue Ren's strength is simply too stupid.
Anyway, it's not like Xue Ren can afford to keep this staring contest for too long.
He, ind the end, is one of three invaders.
The numbers are their main disadvantage!