King Elbas didn't show any emotion when Noah returned, but his underlings didn't manage to imitate him.
Second Prince smiled when looking at him. He appeared truly happy that Noah was still alive and could find his way back to the group.
Instead, First Prince and First Princess revealed ugly expressions. They didn't like Noah because he was the most promising new powerhouse in the world. Losing him there would have solved many of their future problems.
Noah didn't care about the stares. He had chosen to return because he didn't feel confident in succeeding in the mission without King Elbas' knowledge.
Still, the Royals' leader was the only one who didn't reveal anything, so he wanted to proceed with the mission. There was no point in wasting more time in that hostile environment.
The other powerhouses felt the same way. They wanted to take care of the last guardian and return to the surface as soon as possible.