"You said... you know what his ability is?" Sheraya was somewhat surprised, "We've only just met for a few seconds, without even a fight, and you can tell?"
"Only through observation and a bit of speculation," Fei Ye replied. "It might not be accurate, but I believe it's highly credible."
"So, what exactly is that person's ability?" Xiao Yi asked.
"Of course..." Fei Ye started to say, suddenly paused, then looked at Sheraya and said, "Sheraya, just in case, set up a soundproof barrier first. This should be a small feat for you, right?"
"...Soundproofing? Got it." Sheraya nodded and immediately unfolded a soundproof barrier.
Though there were no other people around, according to the rules, generally, as long as an ability isn't harmful, its range is unlimited.
That means it's very likely that someone unknown was using an ability to spy on Xiao Yi and the others.