Naturally, Marui considered himself a genius at understanding people, but Yanagi was more than strong enough at interpreting observable data to compensate. This was court gossip masquerading as the scientific method. Not that Marui is complaining!

"He wants to play," Marui said. That's why you bring your own gear from Day 1: eagerness to use it. And the kid had a quiet cockiness and composure to him, smart enough to at least not immediately challenge the strongest players in the club. Maybe he wanted to observe them in action first. Well, Marui would be a lying liar if he said the feeling wasn't mutual.

"Why don't we let him?"

The remainder of the sentence-- see how tall the ceiling is.-- went unsaid.