Alberto had gone away to tend to the count's needs. Amelia was busy memorizing the magic spell models. Roy and Arlo were contesting who could scrutinize the room better.
Seeing the magic spell models in Amelia's hands, Arlo was surprised. But what shocked him even more was that Roy was stronger than a trainee. Without using any equipment, he was able to determine Roy's power level. That spoke volumes of how discerning he could be. Although he looked like a not-so-intelligent man, he was actually smart, like a fox.
To not come off as too overbearing and make Roy feel like he was putting him on a hard spot, Arlo didn't point "that" out, nor did he ask where the maid got those papers.
Roy, on the other hand, was scrutinizing his every move. He had intentionally not hidden anything from this uncle of his to see what he would do.
He was testing him, trying to feel him out.
But Arlo didn't take any action, confusing him.
