Carl found this short break to be a great opportunity to get closer with the other disciples. Normally he wouldn't associate with the lower class, but William was incredibly strong for a non-Cultivator and Natsu and Filipe had very strange and unique abilities.
"William, that was quite the powerful move you used on my Shadog. What Rank is your Fire Magic?" Carl asked carefully.
"Uh, I've never tested it. Probably around D Rank." William lied. Carl's way of speaking was quite odd, but he didn't seem to have ill intent.
"I see I see. You're also an impressive with Arrays, who taught you how to use them? Do you have a master?"
Carl was trying to be friendly, but William was becoming uncomfortable. "I just learned them by chance."