Let's rewind time...
When Roan had flown back halfway to Besgol, he had slowed the flight and told Aurundi that it was for safety's sake. Now, was that really the case?
Of course not!
That day, Rean took out another airplane. This one wasn't like his own, with all the improvements. It was actually a normal market model, although it had been made using his own designs that he had shared with the Arrays Masters Guild. Not even Aurundi noticed when Rean switched airplanes, especially since the twins' group was already traveling along a different route from their original path.
Since it was based on his own designs, it obviously had the Light Bending Array Plates. That made Rean invisible to the naked eye, preventing anyone from seeing the airplane as it traveled through the sky. As for the natural perception that Godly Creatures had toward cultivators, it didn't work on Rean either because he used the Godly Pressure Disguise of their cultivation technique.
